Appellants Karen Kokins and the City of Westminster sued Teleflex in this products liability action. The jury returned a verdict for Teleflex. Appellants now ask us to grant them a new trial because they claim that the district court improperly instructed the jury on two issues. First, Appellants contend that the district court failed to give the appropriate instruction for determining whether a product is defectively designed. Second, they allege that the district court erred by instructing the jury regarding a Colorado statutory presumption of non-defectiveness. Because we conclude that the district court did not err, we AFFIRM its entry of judgment for Teleflex.
I. BACKGROUND
Ms. Kokins was employed as a park ranger for the City of Westminster, Colorado, at the City’s Standley Lake facility. On July 6, 2004, she was on duty and patrolling the lake by boat when the boat’s steering cable suddenly snapped, causing the boat to careen sharply and throwing Ms. Kokins overboard. She sustained serious and lasting injury to her ankle as a result of the accident. Despite five surgeries, she has not regained normal use of it. Ms. Kokins and the City brought suit in Colorado state comb against Teleflex, the maker and seller of the steering cable, alleging, inter alia, that the cable was defectively designed and unreasonably dangerous. Ms. Kokins sought damages in connection with her injuries. The City sought to recover the amount it had paid Ms. Kokins in workers’ compensation. Pursuant to 28 U.S.C. § 1441, Teleflex removed the case to federal district court based on diversity of citizenship.
A. Evidence Presented at Trial
The parties agreed that the steering cable snapped because water had entered its inner core and caused it to rust. 1 But they disagreed about how the water got there, and whether the cable could have been designed to avoid such corrosion. This made the design of the cable a critical disputed issue at trial.
Appellants alleged that the cable was defective in two ways. First, they argued that a design defect allowed water to invade the cable, causing its carbon-steel core to rust. Appellants’ experts presented evidence of how water entered the core and contended that grease fittings or 0-rings could have sealed gaps in the cable. Teleflex’s experts responded with evidence that the cable on Ms. Kokins’s boat was incorrectly installed. Teleflex also pointed out that boat operators are instructed to regularly grease the cable to prevent water penetration, and elicited testimony that City employees had failed to undertake this routine maintenance. One Teleflex engineer testified that of the four to five million cables sold since the early 1960s, *1294 none had failed in the manner of the cable installed in Ms. Kokins’s boat.
Second, Appellants contended that the cable was defective because its inner core should have been made of stainless steel rather than carbon steel. Stainless steel was a safer choice, Appellants claimed, because it was less prone to corrode if water did invade the cable core. Teleflex countered with expert testimony that carbon steel is preferable because it is stronger than stainless steel. Further, experts for Teleflex testified that carbon steel expands when it rusts, causing the cable to stiffen, making the boat more difficult to steer, and alerting the operator that the cable needs to be replaced. By contrast, stainless steel is subject to sudden cracking under stress and provides no advance warning that it is deteriorating.
Altogether the jury heard testimony about the design, use, and installation of the cable from eight witnesses — a forensic engineer, a mechanical engineer, two mechanics, a metallurgist, a consultant, a product assurance manager for Teleflex, and a former Teleflex senior design engineer.
B. Disputes Concerning Jury Instructions
The two disputes forming the basis for this appeal arose when it came time to instruct the jury. First, the parties disagreed about the proper instruction for determining whether a product is defectively designed and unreasonably dangerous. Colorado law provides two different tests. Under the “consumer expectation” test, the jury is instructed to find defectiveness if the plaintiff proves that a product is dangerous “to an extent beyond that which would be contemplated by the ordinary consumer who purchases it.”
Ortho Pharm. Corp. v. Heath,
The second dispute centered on the applicability of Colorado Revised Statute § 13-21-403(3), which creates a presumption that a product is not defective once it has been on the market for ten years. Over Appellants’ objections, the district court instructed the jury on the presumption.
The jury returned a verdict for Teleflex and the district court entered judgment accordingly. Ms. Kokins and the City timely appealed. We have jurisdiction pursuant to 28 U.S.C. § 1291.
II. DISCUSSION
A. Jury Instruction for Defective Design
Appellants first argue that the district court erred when it refused to instruct the jury on Colorado’s consumer expectation test. We detect no error in the instruction given by the district court.
1. Standard of Review
“We review the district court’s decision about whether to give a particular instruction for abuse of discretion.”
Martinez v. Caterpillar, Inc.,
In a diversity case like this one, the substance of jury instructions is a matter of state law.
City of Wichita,
2. Legal Background
Appellants argue that the district court misapplied Colorado law when it refused to instruct the jury on both the consumer expectation test and the risk-benefit test. To grapple with this contention, we must discern the import of Colorado law.
The guiding case for us is
Camacho v. Honda Motor Co., Ltd.,
In reaching this result, the court offered a standard for identifying those cases where the consumer expectation test would not be sufficient:
[Exclusive reliance upon consumer expectations is a particularly inappropriate means of determining whether a product is unreasonably dangerous ... where both the unreasonableness of the danger in the design defect and the efficacy of alternative designs in achieving a reasonable degree of safety must be defined primarily by technical, scientific information.
Id.
at 1246-47 (citing
Ortho Pharm. Corp.,
Our court was called upon to apply
Camacho
in
Montag v. Honda Motor Co. Ltd.,
3. Proceedings before the District Court
The district court considered extensive arguments on whether to instruct the jury in accordance with the consumer expectation test, the risk-benefit test, or both. Appellants argued that both instructions should be given. On the other hand, Teleflex urged the district court to instruct the jury only under the risk-benefit test. Acknowledging that it was a “difficult call,” the court agreed with Teleflex and decided to give only the risk-benefit instruction. In explaining its decision the court stated:
I am going to go on the basis of the risk harm instruction only to avoid jury confusion in a case that seems here to be premised on an unusual set of circumstances of an alleged design defect allowing a break to occur in circumstances where the alternative suggested is much beyond the knowledge of the ordinary consumer and it is based upon distinctions primarily technical and scientific, namely whether there is an alternative design of stainless steel to carbon.
ApltApp. at 815. Later, the district court explained further that its conclusion was “based upon what seems to be the mandate that the risk benefit formulation be used where you are dealing with technical or scientific information beyond the normal — what would be expected of the normal consumer.” Id. at 866 (emphasis added). It seems to us that the best interpretation of the statements above is that the district court held that (1) this case involved primarily technical and scientific evidence, and (2) it thus was required to give only the risk-benefit instruction.
The district court accordingly rejected Appellants’ request to instruct the jury on both tests and instead gave the following instruction: “A product is unreasonably dangerous because of a defect in its design if it creates a risk of harm to persons or property that is not outweighed by the benefits to be achieved from such design.” Id. at 966.
4. The District Court Did Not Err
On appeal, Appellants seem to contend that two errors underlie the district court’s failure to give the consumer expectation instruction. First, Appellants argue that the district court erred “because it excluded the ‘consumer expectation’ test as a possible basis for liability under Colorado law,” Aplt. Opening Br. at 25, instead instructing the jury on the risk-benefit test and effectively treating the two tests as mutually exclusive. Second, Appellants contend that the court erred in concluding that this case involved primarily technical and scientific information: “An ordinary person can understand, without the benefit of scientific or technical information, that it is unreasonable to use a material that will rust and corrode in a marine steering cable.... In short, rust is not rocket science.” Id. at 22.
a. Exclusion of the Consumer Expectation Test
We first address Appellants’ argument that the district court erred by concluding that, once it found that this case involved primarily technical and scientific information, it was required to give only the risk-benefit instruction. In support of their allegation of legal error, Appellants hold up
Biosera, Inc. v. Forma Scientific, Inc.,
In
Biosera,
the Colorado Court of Appeals did appear to conclude that the two tests were not mutually exclusive. The
Biosera
court stated that “we do not read
Camacho
as precluding application of the consumer expectation test in an appropriate case.”
In light of
Montag,
however, we interpret Colorado law on this question as follows: where a case is defined primarily by technical and scientific information, the court must use only the risk-benefit test; it may not use the consumer expectation test, and it may not use both tests together.
See Montag,
To the contrary, it is Appellants’ argument that is flawed;
Montag
is controlling law. Appellants are correct to note,
see id.,
that “[t]he decision of an intermediate appellate state court is a datum for ascertaining state law which is not to be disregarded by a federal court unless it is convinced by other persuasive data that the highest court of the state would decide otherwise.”
Stickley v. State Farm Mut. Auto. Ins. Co.,
*1298 b. “Primarily” Technical and Scientific Information
Appellants also contend that the district court erred in instructing the jury concerning the risk-benefit test in any event because the case does not involve primarily technical and scientific information. In that regard, Appellants assert: “Although the case does involve some technical and scientific information, an ordinary person can form reasonable expectations regarding the dangerous risks posed by the cable and the efficacy of alternative designs.” Aplt. Reply Br. at 11 (emphasis added); see also id. at 7 (“Plaintiffs have never argued that this case does not involve some technical and scientific information.” (emphasis added)). We discern no error.
To assess this argument we must look to Colorado cases to see which products they have deemed to involve primarily technical and scientific information. We have already reviewed
Camacho,
in which the Colorado Supreme Court found that the feasibility of installing leg guards on a motorcycle was defined primarily by technical and scientific information because “manufacturers of such complex products as motor vehicles invariably have greater access than do ordinary consumers to the information necessary to reach informed decisions concerning the efficacy of potential safety measures.”
In
Ortho Pharmaceutical Corp.,
the direct predecessor to
Camacho,
the Colorado Supreme Court found that the dangerousness of an oral contraceptive was defined primarily by technical and scientific information.
In
Armentrout,
a crane oiler sued the crane manufacturer to recover for injuries that he suffered when he was trapped in a pinch point between moving parts of the crane.
See
In light of these cases, we conclude that this case primarily involved technical and scientific information. In particular, there was testimony of this sort about the steering cable, its manufacture and design, the measures taken to keep water from entering its inner core, the possible avenues of entry for water into the core, and the chemical and physical properties of two different kinds of steel. Even if this information was not as technical and scientific as the level of estrogen found in the oral contraceptive at issue in Ortho Pharmaceutical Corp., it seems that the design of the steering cable was at least as technical and scientific — if not more so — than the design of a motorcycle without leg guards in Camacho or the design of a crane with a dangerous pinch point in Armentrout.
Although common knowledge of rust may have aided the jury’s understanding of the issues, both parties proffered technical and scientific evidence from various expert witnesses. Indeed, Appellants themselves called as witnesses two boat mechanics, see Aplt.App. at 159-60, 316— 17, a mechanical engineer, see id. at 219-20, and a forensic engineer and a metallurgist, see id. at 268-69. Appellants’ arguments appear to tacitly acknowledge that the issue for the jury’s consideration was one of a technical and scientific nature. See Aplt. Opening Br. at 7 (“Plaintiffs’ experts testified that it would be foreseeable to any engineer that water would likely enter the carbon steel core in a marine environment and cause corrosion.” (emphasis added)).
Thus, we hold that the district court did not commit error in determining that, if it concluded that the case involved primarily technical and scientific information, then it was required to instruct the jury only in accordance with the risk-benefit test. Nor do we believe that the district court erred in concluding that this case involved primarily technical and scientific information.
B. Jury Instruction on Presumption of Non-Defectiveness
Appellants’ second contention is that the district court erred by instructing the jury under Colorado law that a product is presumed not to be defective once it has been on the market for ten years. We disagree.
1. Standard of Review
As discussed in the context of Appellants’ first argument, we review a district court’s decision to give a jury instruction for an abuse of discretion.
Martinez,
2. Legal Background
At issue here is Colorado Revised Statute § 13-21-403(3), which provides that, in a products liability case, “[t]en years after a product is first sold for use or consumption, it shall be rebuttably presumed that the product was not defective and that the manufacturer or seller thereof was not negligent and that all warnings and instructions were proper and adequate.”
In 1992, the Colorado Supreme Court held, in
Mile Hi Concrete, Inc. v. Matz,
To establish liability, a plaintiff must prove each element of a claim for relief by a preponderance of the evidence. A plaintiff has the burden of persuasion as to the defective condition of a product. Regardless of whether a product liability action is grounded in negligence or strict liability, a plaintiff must prove that the product was defective.
Id. (citation omitted). The court noted that Colorado’s evidence law — specifically, Colorado Rule of Evidence 301 3 — provided that “a presumption does not shift the burden of persuasion.” Id. It reasoned that “[i]t is precisely because the plaintiff (the party against whom the presumption is directed) already has the burden of going forward with evidence in this case [as to the issue of defect vel non ] that an instruction based on the statutory presumption of section 13-21-403(3) is meaningless.” Id. Under the court’s rationale, “a plaintiff who has presented sufficient evidence to defeat a motion for a directed verdict has necessarily rebutted the presumption of section 13-21-403(3)” and, consequently, “no reason exists for a trial judge to instruct a jury” on it. 4 Id. (emphasis added). The court further observed that under Colorado law “[t]he only effect of the statutory presumption of section 13-21-403(3) is to impose the burden of going forward on the party against whom it is directed.” Id. at 207. In this regard, the court specifically noted that “[t]he presumption of section 13-21-403(3) is not evidence.” 5 Id. at 206.
We followed
Mile Hi
in
Perlmutter v. U.S. Gypsum Co.,
In 2003, the Colorado General Assembly amended the statute, adding section 13-21 — 403(4), which provides: “In a product liability action in which the court deter *1301 mines by a preponderance of the evidence that the necessary facts giving rise to a presumption have been established, the court shall instruct the jury concerning the presumption.” See 2003 Colo. Session Laws 1289-90 (emphasis added). No Colorado court has yet determined how § 403(4) affects the holding of Mile Hi.
3. Proceedings before the District Court
Without substantial guidance from the Colorado courts, the district court in this case was called upon to determine whether section 13-21-403(4) effectively overruled Mile Hi. Appellants contended that Mile Hi was still controlling; Teleflex countered that the new statute superceded Mile Hi and effected a substantive change in Colorado products liability law. After acknowledging the difficulty of the question, the district court concluded that section 13-21-403(4) had displaced Mile Hi in favor of a “statutory mandate as a part of those statutes which enable the product liability actions in Colorado. And [the presumption] is part of the substantive law of the right to recover in Colorado, and it is a mandated part of that right.” ApltApp. at 958. Accordingly the district court instructed the jury as follows:
Presumptions are legal rules based on experience or public policy. They are established in the law to assist the jury in determining the truth.
Colorado law provides that if you find that this type of steering cable was first sold for use or consumption 10 or more years before plaintiffs injuries, it is presumed that the steering cable was not defective. However, the presumption is rebuttable and you may consider this presumption together with all other evidence in the case in deciding whether the plaintiff has proved by a preponderance of the evidence that the steering cable was defective.
Id. at 967.
4. The District Court Did Not Err
Appellants now contend that the district court erred by instructing the jury on the presumption. They make two arguments. 6 First, Appellants argue that presumptions are a matter of procedure, not substance, and thus they are controlled by federal rather than state law. The federal law on this issue, Appellants claim, can be found in Perlmutter and Wagner, which held that it was error for a trial court to instruct the jury concerning certain presumptions of section 13-21-403. Second, if state law does apply, Appellants contend that section 13-21-403(4) did not undermine Mile Hi’s holding that section 13-21-403(3) is merely a rebuttable presumption — that disappears from a case if the plaintiff survives a motion for directed verdict — and, consequently, is not the appropriate subject of a jury instruction. Teleflex responds that this case is governed by state law, and contends that when the Colorado General Assembly added section 13-21-403(4), it overruled Mile Hi and “changed the effect of the ten-year presumption.” *1302 Aplee. Br. at 14. Both of these arguments are legal in nature, so our review is de novo.
a. State Law Controls
As to the first argument, Appellants are incorrect: the question before us is governed by state, not federal, law. Our polestar is Federal Rule of Evidence 302, which provides: “In civil actions and proceedings, the effect of a presumption respecting a fact which is an element of a claim or defense as to which State law supplies the rule of decision is determined in accordance with State law.” The advisory committee elaborated on the rule’s import:
It does not follow ... that all presumptions in diversity cases are governed by state law. In each case cited [where state law was applied], the burden of proof question had to do with a substantive element of the claim or defense. Application of the state law is called for only when the presumption operates upon such an element. Accordingly the rule does not apply state law when the presumption operates upon a lesser aspect of the case, i.e. “tactical” presumptions.
Fed.R.Evid. 302, advisory committee’s note. In the case at hand, Appellants contend that under Rule 302 the district court was required to apply federal law because the presumption is procedural rather than substantive. Teleflex responds that state law provides the rule of decision here because “[t]he presumption at issue affects the core element of Plaintiffs’ claim and Teleflex’ defense: whether the cable was defective.” Aplee. Br. at 16. Teleflex is correct.
The presumption of section 13-21-403(3) operates with regard to the key substantive issue of defect
vel non.
The Colorado Supreme Court in
Mile Hi
clearly recognized this. In particular, the court understood that when section 13-21-403(3)’s presumption was given its ordinary effect under Colorado law, its application to the substantive question of defect rendered an instruction concerning the presumption “meaningless.”
Therefore, it is patent from Mile Hi’s analysis itself that section 13-21-403(3)’s presumption operates with respect to “an element of a claim or defense as to which State law supplies the rule of decision” and, accordingly, the effect of that presumption must be “determined in accordance with State law.” 7 Fed.R.Evid. 302. 8
*1303 Appellants’ arguments to the contrary-are misguided and unavailing. Their reliance on Perlmutter and Wagner to support the view that federal law provides the rule of decision here concerning the effect of section 13 — 21—403(3)’s presumption is misplaced. These cases are certainly federal law in the sense that they are decisions of our court. However, in both Perlmutter and Wagner, we were interpreting state law in the diversity context, not independently applying federal law. It was only through that diversity lens that we determined that Colorado law, which at the time was defined by Mile Hi, did not permit the jury to be instructed on certain section 13-21-403 presumptions, including the one embodied in section 13-21^103(3). As we discuss infra, to the extent that Colorado’s law has shifted direction on this instructional issue, we are obliged in the diversity context to follow suit.
Furthermore, Appellants’ assertion that “[t]he decision of a federal court as to whether to give or refuse a tendered jury instruction ... is governed by federal law and rules,” Aplt. Opening Br. at 28-29, is true. But it also is irrelevant. The question before us is not whether the district court properly exercised its discretion in “[t]he admission or exclusion of a particular jury instruction.”
City of Wichita,
In sum, guided by Federal Rule of Evidence 302, we are confident that state law controls our assessment of whether the district court erred in instructing the jury concerning section 13-21^403(3)’s presumption.
b. Interpretation of State Law
To address Appellants’ second argument, we must determine whether section 13-21-403(4) had a substantive effect on the nature of the presumption of section 13-21-403(3).
See
1 Jack B. Wein
*1304
stein & Margaret A. Berger,
Weinstein’s Federal Evidence
§ 302.04[1] at 302-9 (Joseph M. Laughlin ed., 2d ed. 2010) (“[0]nce it is determined that a state presumption must be applied under Rule 302, the court must give the presumption the same effect it would be given under state law.”). Appellants essentially contend that it had no substantive impact on section 13-21-403(3)’s presumption and, more specifically, that section 13-21-403(4) does not undermine
Mile
Hi’s holding that the “only effect” of section 13-21-403(3)’s presumption is “to impose the burden of going forward on the party against whom it is directed” and that the presumption is intended to disappear once a plaintiff meets that burden.
Mile Hi,
As we noted above, in diversity cases our task is “simply to ascertain and apply the state law.”
Wankier,
As we are sitting in diversity and construing a Colorado statute, we must give it the meaning it would have in the Colorado courts. “To accomplish this objective, this court must begin with the plain language of the statute. If the statute is unambiguous and does not conflict with other statutory provisions, we need look no further.”
Parish Oil Co., Inc. v. Dillon Companies, Inc.,
Section 13-21^103(4) states that “[i]n a product liability action in which the court determines by a preponderance of the evidence that the necessary facts giving rise to a presumption have been established, the court shall instruct the jury concern *1305 ing the presumption.” Colo.Rev.Stat. § 13-21-403(4) (emphasis added). This plain text indicates that the Colorado General Assembly sought to make clear that, once a showing by a preponderance has been made concerning the facts giving rise to section 13-21-403(3)’s presumption, an instruction regarding the presumption must be given.
In the face of this plain language, Appellants would have us believe that “[t]he General Assembly’s decision to statutorily require a jury instruction reflects nothing more than a legislative determination that, procedurally, a jury instruction on the presumption will not be confusing to the jury.” Aplt. Reply Br. at 16. Setting to one side the observation that this statement seems to concede that the district court here was permitted — though not obliged — to instruct the jury on section 13-21-403(3)’s presumption, such a reading of section 13-21-403(4) would require us to assume that the Colorado General Assembly passed a superfluous statute— one with a mandatory directive that the General Assembly did not intend to be mandatorily implemented. That would be an absurd interpretation. For us to indulge it, we would have to abandon “our primary duty ... to give full effect to the intent of the General Assembly,”
Colo. Water Conservation Bd.,
Furthermore, Appellants’ suggestion that section 13-21-403(4) merely had a procedural effect on the nature of section 13-21-403(3)’s presumption is misguided. Before the amendment, the presumption operated as a procedural tool for ordering proof — the presumption required a finding in favor of non-defectiveness until some credible evidence rebutted that presumption, at which time the presumption disappeared. In the absence of rebuttal, the plaintiff had not met the burden of going forward and a directed verdict was appropriate.
See Mile Hi,
To be sure, as Appellants note, the Colorado General Assembly did not remove the word “rebuttable” from section 13—21—403(3). But the General Assembly’s deliberate choice — and we must assume that its choice was deliberate,
see, e.g., Stumpf v. Colo. Dep’t of Revenue,
Further, Appellants offer no reason to think that our reading of the statute is erroneous. To the contrary, all indications from Colorado law suggest that we are on the right path. In
Krueger
— the key case relied upon by Appellants — the Colorado Supreme Court “h[e]ld [that] the rebuttable presumptions of undue influence and unfairness do not continue in a case after they are sufficiently rebutted” and, therefore, that plaintiffs “requested instructions — which inform the jury of the presumptions and require the jury to consider the presumptions in conjunction with all the other evidence to determine whether [the defendant] unduly influenced [the decedent] — are improper.”
In sum, we think it clear that, in adding section 13-21-403(4), the Colorado General Assembly said what it meant and meant what it said: “[i]n a product liability action in which the court determines by a preponderance of the evidence that the necessary facts giving rise to a presumption have been established, the court shall instruct the jury concerning the presumption.” Colo.Rev.Stat. § 13-21-403(4) (emphasis added). Properly instructed, the jury may consider this presumption along with traditional forms of evidence in the case. This is precisely the conclusion that the district court reached here.
*1307 III. CONCLUSION
For the foregoing reasons, we reject Appellants’ contentions of instructional error. In our view, the district court properly instructed the jury. Accordingly, we AFFIRM the judgment for Teleflex.
Notes
. In its brief, Teleflex describes the cable as follows:
The steering cable is comprised of two main components: the inner core assembly and the outer jacket. The inner core assembly is composed of wire rope, surrounded by a carbon steel helical cable which is in turn encased in water-proof grease. The inner core assembly is itself enclosed within the water-proof outer jacket. The outer jacket is made up of a white polyethylene sheath, which is surrounded by wire wrap and finally encased in a black polyethylene sheath.
Aplee. Br. at 3 (citations omitted). Teleflex designed the cable model at issue in the late 1980s, updating a prior model designed in the early 1960s.
. Separately, Appellants contend that the district court committed error by not instructing on both tests because “the consumer ... is entitled to the maximum of protection" under Colorado products liability law. Aplt. Opening Br. at 24 (quoting Camacho, 741 P.2d at *1298 1246) (internal quotation marks omitted). In light of this goal, Appellants argue, Colorado courts have "approved use of the risk/benefit’ test to expand the liability of product manufacturers, not to restrict it.” Id. (emphasis added). Appellants seem to argue that, in weighing how to instruct the jury, courts are required to put a thumb on the scale and choose the instructions that will maximize the likelihood of a plaintiff's recovery.
Appellants misunderstand Colorado law. Though
Camacho
justified its adoption of the risk-benefit test as a way to further the public policy underlying the doctrine of strict liability in tort, neither that case nor any other suggests that Colorado courts are guided by a public policy that the consumer should win every disputed legal issue. To the contrary, several of the very cases cited by Appellants reversed jury verdicts at the request of the manufacturer.
See, e.g., Armentrout,
. The rule stales that:
In all civil actions and proceedings not otherwise provided for by statute or by these rules, a presumption imposes upon the party against whom it is directed the burden of going forward with evidence to rebut or meet the presumption, but does not shift to such party the burden of proof in the sense of the risk of non-persuasion, which remains throughout the trial upon the party on whom it was originally cast.
Colo. R. Evid. 301.
. This interpretation of the effect of the presumption is in accord with "[t]he most widely followed theory of presumptions,” often referred to as the "bursting bubble” theory.
Tafoya v. Sears Roebuck & Co.,
.Chief Justice Rovira, joined by Justice Vollack, dissented. They would have held that § 13-21-403(3)’s presumption
"does
constitute evidence.”
Mile Hi,
. Appellants raised an additional objection to the presumption instruction before the district court — specifically, that the presumption did not apply because the particular steering cable at issue here was less than ten years old. The district court rejected this argument because it interpreted the phrase “[t]en years after
a
product is first sold for use or consumption,” Colo.Rev.Stat. § 13-21-403(3) (emphasis added), to mean
“a type
of product and not
the
particular product.” Aplt.App. at 960 (emphasis added). Appellants do not raise this argument on appeal. Accordingly, they have waived (that is, abandoned) it.
See Bronson v. Swensen,
. The
Mile Hi
court's ultimate conclusion that "[a]n instruction based on the statutory presumption of section 13-21-403(3) should not be given when there is evidence to the contrary" turned in part on its view that under (extant) Colorado law "[t]he presumption of section 13-21-403(3) is not evidence” and that "[t]he only effect of the statutory presumption of section 13-21-403(3) is to impose the burden of going forward on the party against whom it is directed.”
. Furthermore, our conclusion concerning the operation of section 13-21-403(3)'s presumption also finds support in the nature of the presumption itself. This presumption cannot be characterized as involving "procedural” tactical matters that "do not express a state's policy toward its litigants.” 1 Jack B. Weinstein & Margaret A. Berger, Weinstein's Federal Evidence § 302.02[2][b] at 302-6 (Joseph M. Laughlin ed., 2d ed. 2010) (noting as an example of a procedural or tactical presumption, "the presumption establishing the receipt of a mailed letter,” which “operates tactically as a rule of convenience”); see Fed. R.Evid. 302, advisory committee's note. Instead, it is evident on its face that section 13-21-403(3)'s presumption expresses a state public policy against consumer recovery where a product has been on the market for a substantial period of time. Accordingly, in view of its "substantive policy” nature, we reasonably may conclude that section 13-21-403(3)'s presumption is the kind of presumption that Rule 302’s drafters contemplated would fall within its scope. Weinstein & Berger, supra, § 302.02[2][a] at 302-5; see id. at 302-6 (suggesting that state law should apply under Rule 302 where a statute "effectuated a state policy favoring the plaintiff or the defendant in the particular situation involved”).
