OPINION OF THE COURT
I. INTRODUCTION
This case reviews whether a provision in an insurance policy is ambiguous. Upon review of the relevant case law and the tenets of contract construction, we And there are two reasonable interpretations of the policy language. Therefore, pursuant to Delaware law, we conclude that the provision is ambiguous, and we construe it in favor of the insured. We remand the case to the District Court for further findings in accordance with this decision.
II. BACKGROUND
This case addresses whether particular language contained in a “personal injury” provision of a comprehensive general Lability (“CGL”) insurance policy is ambiguous. The CGL policy at issue is a standard form policy prepared by the Insurance Service Office (“ISO”). It provides that the insurer will defend and indemnify the insured against claims alleging damages for “personal injury.” The personal injury offenses covered under the policy include definition 10(c), which reads as follows:
10. “Personal injury” means injury, other than “bodily injury,” arising out of one or more of the following offenses:
c. The wrongful eviction from, wrongful entry into, or invasion of the right of private occupancy of a room, dwelling or premises that a person occupies by or on behalf of its owner, landlord or lessor.
App. of Appellant, at A141 (CGL Policy No. GL 590-62-18-RA).
The above language gave rise to a declaratory judgment action brought on October 21, 1996 by New Castle County, Delaware (“the county”) in the District Court for the District of Delaware against National Union Fire Insurance Company of Pittsburgh, Pennsylvania (“National”). 1 Between 1991 and 1994, the county purchased a series of CGL policies from National (collectively “the CGL policy” or *341 “the policy”). 2 When Frank E. Acierno, a developer, filed three lawsuits against the county (collectively, “the Acierno actions”), the county turned to National to defend and indemnify it against the suits. In general, the Acierno actions alleged that the county violated Acierno’s constitutional rights by re-zoning or refusing to issue building permits for his property. More specifically, the actions were styled as follows: (1) the first suit alleged violations of Acierno’s constitutional rights for failure to issue a commercial building permit on a parcel of land owned by Acierno; 3 (2) the second alleged that an ordinance passed by the county to re-zone one of his properties violated his civil rights; 4 and (3) the third, filed after the county’s final denial of the building permit, essentially restated the same facts and violations as the first suit. 5
Because the county believed that the Acierno actions state a claim for “invasion of the right of private occupancy” as defined in definition 10(c) of the CGL policy, it sought to have National defend and indemnify it in those suits. National disclaimed coverage under the CGL policy for the Acierno actions. 6 The county then filed the declaratory judgment action underlying this appeal.
National responded to the County’s declaratory judgment action with two counter-arguments. First, National asserted that the offense of “invasion of the right of private occupancy,” as contemplated by definition 10(c), is limited to tangible interference with a possessory interest in property. Since the Acierno actions > did not allege interference with a possessory interest, but rather with the use and enjoyment of land, National asserted that the actions do not fall within the coverage of definition 10(c) and, consequently, National had no obligation to defend or indemnify the county. Second, National argued that based on the “by or on behalf of’ language in definition 10(c), coverage is available only when the insured commits an “invasion” as the owner, landlord, or lessor of the property at issue. Since the county does not claim to be the owner, landlord, or lessor of any Acierno properties, National maintained *342 that it had no obligation to defend the county in those suits.
On December 30, 1997, the District Court issued an opinion granting summary judgment to National, holding that definition 10(c) unambiguously “contemplates coverage for acts such as evictions, entries and invasions committed by one acting by or on behalf of the property’s owner, landlord or lessor.”
New Castle County v. National,
This appeal ensued. The county asserts that the District Court erred in finding that definition 10(c) only provides coverage for acts committed by or on behalf of an owner, landlord, or lessor. On appeal, the county argues that definition 10(c) is ambiguous and should be construed in its favor. The issue presented to this Court on appeal is thus a narrow one. In short, we must determine whether definition 10(c) is ambiguous.
Because the issue addressed in this opinion is one of first impression under Delaware law, we must predict how the Delaware Supreme Court would resolve it. After examining the parties’ conflicting interpretations, relevant case law, tenets of contract construction, and the policy’s language and purpose as a whole, we conclude that definition 10(c) is ambiguous and must be construed in favor of the county. Like the District Court we, too, will not reach the question of whether the allegations made in the Acierno actions state a color-able claim for an invasion of the right of private occupancy. Accordingly, the District Court’s determination that definition 10(c) is unambiguous will be reversed, and this case will be remanded to the District Court to determine, in light of our holding, whether the violations alleged in the Acier-no actions constitute an invasion of the right of private occupancy.
III. DISCUSSION
A. Scope and Standard of Review
We assert jurisdiction over this appeal under 28 U.S.C. § 1291. Jurisdiction below was premised on diversity of citizenship, and the District Court properly applied the substantive law of Delaware.
See Erie R.R. v. Tompkins,
The issue before this Court, simply put, is whether definition 10(c) is ambiguous. Whether an insurance policy is ambiguous is a question of law,
see International Union v. Mack Trucks, Inc.,
B. Delaware Law on Interpreting Insurance Policies
As we must predict how the Delaware Supreme Court would decide this issue, it is necessary that we first understand Delaware law on this matter. Before an insurer is obligated to defend or indemnify a policyholder, the insured must demonstrate that coverage is available under the policy.
See New Castle County v. Hartford Accident and Indem,. Co.,
-Whether the Acierno actions potentially state a claim for which National has assumed liability depends upon how we interpret definition 10(c). As a basic matter, Delaware law requires us to interpret insurance contracts “in a common sense manner.”
SI Management L.P. v. Wininger,
“Absent some ambiguity, Delaware courts will not destroy or twist policy language under the guise of construing it,”
Rhone-Poulenc Basic Chemicals Co. v. American Motorists Insurance Co.,
• The premise underlying the principle of contra proferentem is that an insurance contract is one of adhesion.
See State Farm Mut. Auto. Ins. Co. v. Johnson,
[T]he insurer ... is the entity in control of the process of articulating the terms [of an insurance contract]. The other party ... usually has very little to say about those terms except to take them or leave them or to select from limited options offered by the insurer!... Therefore, it is incumbent upon the dominant party to make the terms clear. Convoluted or confusing terms are the problem of the insurer ...—not the insured ....
Penn Mut. Life Ins. Co. v. Oglesby,
Because ambiguous language is construed against the insurer as a matter of law, we take special note of Delaware law for determining whether language is ambiguous. “The settled test for ambiguity is whether the provisions in controversy are reasonably or fairly susceptible of different interpretations or may have two or more different meanings.”
Phillips Home Builders, Inc. v. Travelers Ins. Co.,
C. Definition 10(c) is Ambiguous
Against this backdrop of Delaware law, we turn to the task before us of determining whether definition 10(c) is ambiguous. First, we consider the respective arguments of the parties and the relevant case law. We attempt to balance the weight of authority on this precise issue, but find that additional guidance is needed. Consequently, we turn to the tenets of contract construction. Finally, we examine the disputed language within the policy as a whole. Using these tools, we conclude that definition 10(c) is ambiguous.
National and the county assert different interpretations of the phrase “by or on behalf of its owner, landlord or lessor.” National argues, and the District Court held, that the phrase can only mean that the wrongful act—the eviction, entry or invasion—was done “by or on behalf of [the premises’] owner.” The county replies that it is equally logical, or at least reasonable, to interpret the phrase as explaining how the premises in question is occupied. In its view, the language indicates that the “room, dwelling or premises” must have been occupied “by or on behalf of its owner, landlord or lessor.” This distinction is critical because the county’s reading does not require that the wrongful act have been instigated by the “owner, landlord or lessor” of the premises while National’s does. As the county clearly was not -an “owner, landlord or lessor” of Acierno’s property, the latter interpretation is the only one under which the county can claim coverage.
1. National’s Interpretation of Definition 10(c)
Under National’s construction, to qualify for coverage, the invasion offense must be committed “by or on behalf of the owner, the landlord, or lessor.” Applied to the facts in this case, National would be obligated to defend the county against claims of invasion only if the county were the owner, landlord, or lessor of the property at issue in the Acierno actions.
In support of this position, National cites three cases: (1)
United States Fidelity and Guaranty Co. v. Goodwin,
In
Goodwin,
the court held that language identical to definition 10(c) “unambiguously requires that the wrongful entry be committed by the owner, landlord, or lessor of the room, dwelling, or premises.”
*345
[t]he wrongful eviction from, wrongful entry into, or invasion of the right of private occupancy of a room, dwelling or premises that a person occupies by or on behalf of its owner, landlord or lessor,
The
Goodwin
court found that the word “its” modifies “room, dwelling or premises,” and not “person.”
In
TerraMatrix,
the Colorado Court of Appeals also found language identical to definition 10(c) “unambiguous and applicable only to entries, evictions and invasions committed by or on behalf of the owner, landlord or lessor.”
In
TGA Development,
the Eighth Circuit commented that it “doubt[ed] very much that coverage is available under” a personal injury provision identical to definition 10(c) because the insured could not “even eolorably be characterized as owner, landlord, or lessor.”
TGA Development,
In addition to the above cases, the District Court also cited
Patel v. Northfield Insurance Co.,
In sum, National has offered some authority that suggests definition 10(c) is not ambiguous. Upon close inspection of the cases, however, we find the authority to be unpersuasive or of limited precedential value. As such, standing alone, the authority forwarded by National does not resolve whether definition 10(c) is clear or ambiguous. With that we turn to the county’s interpretation of definition 10(c).
2. The County’s Competing Interpretation of Definition 10(c)
The county urges this Court to accept an alternative reading of definition 10(c) as reasonable. According to the county, the phrase “by or on behalf of’ defines the possessory interest of the person aggrieved in 10(c). Under this interpretation, in order for the insured to invoke coverage for an invasion, the claimant must have the right to occupy the premises, either as owner, landlord, or lessor, or with the permission of the owner, landlord, or lessor.
In support of its interpretation, the county cites
United States v. Security Management Co.,
The Seventh Circuit’s commentary on the meaning of the clause again is dicta, however. Its holding is based on the fact that the litigants claiming an invasion in that case “unquestionably lacked any ... enforceable claim of occupancy,” Id. at 265; indeed, the litigants were “testers,” or civil rights activists who posed as apartment-hunters but who did not actually rent a unit. Id. at 265. As we noted earlier, we are not bound by this dicta, although we may consider it in our analysis if we deem it appropriate. See supra n. 7.
The county also cites
Blackhaw
k—Cen
tral City Sanitation District v. American Guarantee & Liability Insurance Co.,
*347 In sum, the county has presented this Court with authority to suggest that definition 10(c) is ambiguous. The case law it cites—Security Management and Black- hawk—Central—however, is either dicta or void of analysis and thus it does not, by itself, establish that definition 10(c) is ambiguous or that the county’s interpretation is reasonable. Having reviewed the relevant case law supporting both sides of the issue, we consider the weight of the authority.
3. The Weight of the Authority
To predict how the Delaware Supreme Court would decide this case, we must consider “reliable data tending convincingly to show how the highest court in the state would decide the issue at hand.”
McKenna v. Ortho Pharm. Corp.,
The most we can glean from the conflicting case law on this issue is that, as a starting point, definition 10(c) may reasonably be susceptible to more than one interpretation. When faced with a similar situation in another case, we explained that
[although the presence of conflicting judicial decisions does not automatically mandate a finding of ambiguity, we think it has some relevance.... We are confronted here with two lines of contrasting cases ... While it is our responsibility to ascertain which of these lines is most likely to -be followed in Delaware, we cannot help but view such a division as at least suggesting that the ... [contested term] is susceptible of more than one reasonable definition.
New Castle v. Hartford I,
4. Rules of Contract Interpretation
Insurance policy disputes often turn on the meaning of a single term or phrase.
See, e.g., New Castle v. Hartford I,
National argues that definition 10(c) is not ambiguous. The heart of its argument is that the phrase “by or on behalf of its owner, landlord or lessor” modifies “wrongful eviction from, wrongful entry into, or invasion of the right of private occupancy,” and thus requires that the insured be the owner, landlord or lessor of the property at issue. The county, on the other hand, maintains that “by or on behalf of’ pertains to its nearer antecedent “person,” establishing the requirement that the claimant have the right to occupy the premises.
The grammatical construction of contracts generally requires that a qualifying or modifying phrase be construed as referring to its nearest antecedent.
See Bakery and Confectionery Union and Indus. Int’l Pension Fund v. Ralph’s Grocery Co.,
When we apply this rule of construction to definition 10(e), it is plain that “by or on behalf of’ modifies “that a person occupies,” the language that directly precedes it, and not the “wrongful eviction from, wrongful entry into, or invasion of the right of private occupancy” language that commences definition 10(c). On this basis, we find the county’s interpretation of definition 10(c) to be entirely reasonable. Because definition 10(c) is subject to more than one reasonable interpretation, it is ambiguous, and must be construed in favor of the county. 10 See supra section III.B. *349 (noting that ambiguous language is construed against the insurer as a matter of Delaware law).
Our finding that the county’s interpretation of definition 10(c) is reasonable is not diminished by the fact that this interpretation may render portions of the provision surplusage in cases of “wrongful eviction” and “wrongful entry.” As noted earlier, under Delaware law, we must consider the phrase “by or on behalf of’ in the context of definition 10(c) as a whole.
See Cheseroni v. Nationwide Mut. Ins. Co.,
In this vein, we note that interpreting the phrase “by or on behalf of’ to require a claimant to have the right to possess the room does not necessarily render the word “wrongful” surplusage. Whereas an “invasion of the right of private occupancy” is itself a tortious act, both evictions and entries can be executed rightfully. For example, a landlord may rightfully evict a tenant who has not paid rent. Thus, the word “wrongful” complements the “by or on behalf of’ language by ensuring that coverage under definition 10(c) is limited to situations in which the insured has com
*350
mitted a wrongful, tortious act. As we have noted in the past, insurance policies are often written with an abundance of caution; indeed, they routinely use words or groups of words that are fairly synonymous with one another, particularly to underline a salient point.
See New Castle v. Hartford I,
We also reject National’s argument that its interpretation of definition 10(c) alone makes sense when viewed in the context of the entire CGL policy. It argues that the “entire object of the CGL policies” is “to insure against the tortious conduct of the insured.” Br. of Appellee, at 28. We recognize that the Delaware Supreme Court has considered the “purpose of liability policies in general” to determine the scope of coverage.
E.I. du Pont de Nemours & Co. v. Allstate Ins. Co.,
Furthermore, we reject National’s claim that under the county’s interpretation
there would have been no conceivable way for Appellee to rate the actuarial risk involve in issuing the CGL policies .... Appellee can only sell Appellant a policy of CGL insurance if there is a readily quantifiable number of properties which Appellee [sic: Appellant] owns, leases or rents. If Appellant’s interpretation had been accepted by the parties at the time the subject CGL policies were issued, the premium charged to Appellant for such coverage would have been astronomical since Appellant could potentially be held liable for wrongfully entering or invading an everexpanding number of “rooms, dwellings, or premises” within New Castle County.
Br. of Appellee, at 41. In brief, National claims that its interpretation of definition 10(c) is the only reasonable one because otherwise, it would have been impossible for National to assess the actuarial risk involved in issuing a policy to the county. National’s argument fails for several reasons. First, National claims that it would only issue a policy to the county if National could quantify the number of properties the county owned, leased, or rented. Yet, this Court could not find, and indeed National did not identify, any provision in the policy that limited the county’s ability to buy, lease, or rent new properties while covered by the policy. Thus, there does not appear to be any policy mechanism that fixes the number of properties the county owns, leases, or rents within the limits supposedly established by the amount of the premium.
Second, the invasion offense is just one of several personal injury offenses listed in definition 10. See App. to Br. of Appellant, at A141 (CGL Policy). National claims that without knowing the number of properties owned, leased, or rented by the county, it could not assess the county’s risk for claims of eviction, entry, or invasion. *351 Assuming that is true, how does National assess the county’s risk for “false arrest, detention, or imprisonment” without knowing how many people the county could falsely arrest? Or “malicious prosecution,” without knowing how many people the county could potentially maliciously prosecute? And again National has not indicated that the policy limits the coverage of these personal injury offenses to a specific number. It seems to this Court that there are a potentially infinite number of people the county could libel or slander through an infinite number of written and oral statements, and yet National was able to calculate a premium to insure the county in connection with those offenses.
Third, we must be sure to read the policy language from the average consumer’s point of view.
See New Castle v. Hartford I,
Lastly, and most importantly, what National
intended
definition 10(c) to mean is very different from what the provision’s language
conveys.
At best, National’s actuarial argument suggests that National has a sound business rationale for the interpretation of definition 10(c) it urges on this Court. The argument does not, however, demonstrate that National succeeded in drafting a policy that limited coverage for the invasion offense only to cases when the county was the owner, landlord, or lessor.
Cf. Little,
In sum, both National and the county “offer reasonable, though problematic, interpretations” of definition 10(c).
Phillips Home Builders, Inc. v. Travelers Ins. Co.,
Finally, because the District Court did not reach the issue of whether the Acierno actions stated a claim for an invasion, we decline to reach that issue on appeal.
See
*352
Selected Risks,
IV. CONCLUSION
For the foregoing reasons, the portion of . the District Court judgment finding that definition 10(c) is unambiguous will be reversed. The case will be vacated and remanded to the District Court to determine whether the Acierno actions constitute an invasion of the right of private occupancy.
Notes
. The District Court based its jurisdiction on diversity of citizenship. See 28U.S.C.§ 1332 (1994).
. The county purchased three CGL policies from National: Policy No. GL 590-44-26-RA, effective July 1, 1991 to July 1, 1992; Policy No. GL 590-62-18-RA, effective July 1, 1992 to July 1, 1993; and Policy No. GL 590-73-01-RA, effective July 1, 1993 to July 1, 1994. As the District Court noted, these policies do not differ from one another in any significant way.
See New Castle County, Delaware v. National Union Fire Ins. Co. of Pittsburgh, PA,
No. CIV. A. 96-504 LON,
.
Acierno v. Mitchell,
No. Civ. A. 92-384-SLR
("Acierno I").
Acierno moved for a preliminary injunction, which the trial court granted on December 30, 1992. On appeal, this circuit held that the dispute was not ripe for judicial review, vacated the lower judgment, and remanded the case with instructions to dismiss it without prejudice.
See Acierno v. Mitchell,
. Acierno v. Cloutier, No. Civ. A. 92-385-SLR ("Ademo II"). This case was disposed of by a joint stipulation approved by the District Court on October 24, 1997. Br. of Appellant, at 12.
. Acierno v. New Castle County, No. Civ. A. 93-579-SLR ("Ademo III”). This case was tried in the Spring of 1997. According to the county, it was required to issue a building permit and the case was eventually settled in accordance with the Ademo II stipulation. Br. of Appellant, at 14.
. National has actually only disclaimed coverage under the CGL policy for
Ademo I
and
II.
Yet, the District Court concluded in its opinion that, although National has apparently not declared its official coverage position with regard to
Ademo III,
the issue of National's obligation to defend and indemnify the county in
Ademo III
was nonetheless ripe for adjudication, in part because it is likely that National would disclaim any obligation to defend or indemnify the county in connection with
Ademo III. See New Castle County v. National,
. We can, of course, accord dicta as much weight as we deem appropriate.
See, e.g., Girard Trust Co. v. United States,
. The ISO added the "by or on behalf of” language to definition 10(c) in 1986. Thus, in addition to
Patel,
we reject
Liberty Mutual Insurance Co. v. East Central Oklahoma Electric Cooperative,
. Similarly, the Eleventh Circuit, in
Gibbs v. Air Canada,
applied the same rule of contract construction to a contract in which a company called Aircraft Services agreed to provide various ramp services to Air Canada.
. We hoped that an examination of the punctuation used in definition 10(c) might clarify any ambiguity therein.
See, e.g., Plymouth Mut. Life Ins. Co. v. Illinois Mid-Continent Life Ins. Co. of Chicago, IL,
. The language "a room, dwelling or premises that a person occupies by or on behalf of its owner, landlord or lessor” applies to all three offenses—wrongful eviction, wrongful entry, and invasion of the right of private occupancy. We know this because wrongful eviction is followed by “from,” entry by "into,” and invasion by "of." "From," "into” and "of" are all prepositions, and as such, have an object. The objects in this case are the room, dwelling, or premises. Thus, definition 10(c) must be read, for example, as "wrongful eviction from a room ...,” "wrongful entry into a room ...," or "invasion of the right of private occupancy of a room....”
