Opinion by
T1 Defendant, Jacob Roy Wilson, appeals the judgments of conviction entered on jury verdicts finding him guilty of two counts of sexual assault (by means of sufficient consequence to cause submission against the vie-tim's will). We affirm the judgments of conviction but remand for correction of the mittimus..
I Background
_ 12 Defendant's convictions arose out of an incident involving an intoxicated woman (A.M.) he met in downtown Denver on St. Patrick's Day. According to A.M., she encountered defendant and his friend after she had lost her phone and could not find her friend. She asked defendant and his friend for help and remembered stopping with the two men to speak with a group of women. Her next memory, however, was of the men pulling her pants down to her knees on a parking garage ramp. She said each man straddled and vaginally penetrated her while she was in a squatting position with her back against the wall; she also said that one of the men also orally penetrated her. She explained that the assault had lasted about ten minutes and ended when the men took cash from her wallet and ran away.
18 A.M. had suffered injuries to her vaginal area that were consistent with either nonconsensual or consensual intercourse; defendant's DNA was found on A.M.'s face and neck; and defendant's friend could not be excluded as a source for the mixture of DNA found in A.M.'s underwear.
14 At trial, defendant did not testify, nor did he present any evidence or witnesses .on his behalf, He argued, though, that A.M. had significant gaps in her memory; that the physical evidence supported the conclusion that, while intoxicated, she had consensual sex with him and his friend; that, upon realizing she was involved in an activity which, under normal cirenmstances, she would not involve herself in (e., sex with strangers), AM. filled in the gaps of her memory to-come up with an explanation for (and details about) her involvement in that activity; and that that explanation was that the sex must not have been consensual on her part.
T6 Although it acquitted defendant of robbery, the jury convicted him of the two counts of sexual assault, and the trial court sentenced him to a term of sixteen years to life imprisonment in the custody of the Department of Corrections.
II. Challenges for Couse
T7 Defendant contends that the trial court erred in denying one of his challenges for cause and granting two of the prosecution's challenges for cause. We disagree.
T8 Section 16-10-108(1)(j), C.R.S.2018, and Crim. P. 24(b)(1)(X) require disqualification of a juror if his or her state of mind manifests a bias for or against either side, unless the court is satisfied that the juror will render an impartial verdict based solely upon the evidence and instructions of the court. See Morrison v. People,
T9 A prospective juror who makes a statement evineing bias may nonetheless serve as a juror so long as he or she agrees to set aside any preconceived notions and make a decision based on the evidence and the court's instructions. People v. Phillips,
110 We give great deference to the trial court's determination of a challenge for cause, because such decisions turn on an assessment of the potential juror's eredibility, demeanor, and sincerity in explaining his or her state of mind. Because the trial court is in a better position to evaluate these factors than a reviewing court, we will overturn a trial court's decision concerning a challenge for cause only upon an affirmative showing by the defendant that the court abused its discretion. Shreck,
{11 A trial court abuses its discretion in this context only if there is no evidence in the record to support its decision. People v. Richardson,
{12 Here, all three of the challenged jurors expressed a possible bias:
e Juror R, who had worked for eight years as "a counselor for survivors of domestic violence and sexual assault" and had several friends who were sexual assault survivors, expressed some concern about her ability to be fair;
e Juror W indicated that he "possibly" had a bias against the prosecution; he had had "bad experiences with the justice system" because he had been arrested himself and had seen a friend plead guilty to a sexual assault he did not commit just to minimize jail time; that he had seen "a lot of unfairness and bias in the system" in his friend's case; and, that he had "some biases around" his knowledge of "how t[he] process works,*961 up until the time [the case] comes to the courtroom”; and,
• Juror S believed she had been unjustly convicted of assaulting another woman and that her case had been “pushed right along” by the prosecutor, who she felt was “just trying to move people through” court proceedings; and that, because the report of the police officer handling her case was “one-sided” and “very biased,” she would “probably be a little biased” in evaluating the testimony of a Denver police officer (She would, she said, “definitely” have “a tougher time” with an officer’s testimony than with that of “a guy that ran a florist shop.”).
¶ 13 The trial court denied defendant’s challenge for cause to Juror R but granted the prosecution’s challenges for cause to Jurors W and S.
A Juror R
¶ 14 The court found that, although Juror R was “expressing real concern about her ability to be fair,” she was
not a juror who had—at least exhibits emotional responses on this subject. There was nothing about the experience of anyone she knew that came to the fore here.
This is a woman who had professional experience in the area, and is aware of that, and is aware of the effect it could have, and well aware of the obligations as a juror. I think she has a solid intellectual understanding of what her role is. I don’t think there is any indication she is emotionally unable to perform that role.
¶ 15 In this regard, the record reflects:
• When asked by the prosecutor how she felt about the presumption of innocence, she stated it “is the bedrock of the judicial system, everyone—until the jury says you are guilty, [you] are innocent”;
• She understood that the prosecution had the burden of proof and “the defense doesn’t have to do anything”;
• She “believe[d] it [was her] duty to be as objective as possible. [She did] a lot of . things in [her] history that might bring it into question, but [she] would do [her] best to perform as a responsible citizen”;
• She recognized that her “role here [as a juror] isn’t to be a counselor to the victim, [her] role here is completely different”;
• She stated that, although she could not guarantee it, she was going to try to be fair; and
• She resisted what she perceived as defense counsel’s attempt to get her to say she could not be fair, saying, ultimately, Honestly, yeah, there are probably cases better for me to be on, but I also think that given some of my training, it is also good for me to be here, because I bring some professional expertise.
¶ 16 The record thus reflects that, although her previous work with sexual assault victims was a source of potential bias, Juror R repeatedly stated that she would try to decide the case fairly. Because she indicated that she thought she could fulfill her duties as a fair and impartial juror, we discern no error in the court’s ruling. See Phillips,
¶ 17 In so concluding, we necessarily reject defendant’s reliance on People v. Roldan, 353
{18 We are also not persuaded by defendant's argument that "[t] he arbitrariness of the court's ruling with respect to Juror R readily appears when viewed in connection with the court's rulings on Jurors W and S." An appearance of inconsistency among challenges for cause is not an accurate indication of whether a court abused its discretion. See State v. Baca,
. B. Jurors W and S
. 1 19 We acknowledge that, as was the case with Juror R, nothing Jurors W and S said demonstrated, on its face, an unequivocal and unremitting bias in favor of one side or against the other. But their assurances of attempted impartiality left something to be desired, in comparison with those of Juror R:
e Although Juror W did not think his arrest would affect his ability to serve on the jury, he "clouldIn't honestly say yes or no, [that the way his friend had been treated] won't come into consideration"; and,
® Although Juror S8 said she would not "disbelieve" a police officer's testimony simply because it came from an officer, she also said she would be more "apprehensive" and "cautious" about testimony from an officer.
[20 With respect to Juror W, the court said:
My concern with [Juror WJ, is not that he can't separate out the facts of this friend's case from this case, [but] that he believes our system of justice is one in which defendants are railroaded, in which they plead guilty to things they have not done, because they are exposed to terrible penalties, if they don't do that. That's the area that was on his mind when he satd he has possible bias against the prosecution. That's why I think he indicated that he might well hold the People to a higher standard of proof. And I am, based on his responses, very concerned about his ability to follow the Court's instruction in this case.
121 With respect to Juror S, the court removed her because she was "candid" about the fact that she evaluates the testimony of police officers differently from that of other witnesses.
122 Because the record reflects grounds upon which to believe Jurors W 'and S may have biases, and because it was for the court to determine the sincerity and credibility of any assurances to the contrary, the court acted within its discretion in removing them based on its conclusion that it was not satisfied that they would render an impartial verdict. See People v. Mack,
C. Harmless Error
1283 Even if the court erred with respect to one or even all of the challenges for cause, reversal is not required. To show prejudice sufficient to require reversal, "the defendant ordinarily must show that a biased or incompetent juror participated in deciding his guilt." People v. Wise,
III. Impeachment of A.M.
124 Next, defendant contends that the trial court erred in not allowing him to impeach A.M.'s testimony that she had truthfully answered all of a detective's questions in an interview. We disagree.
125 During .cross-examination, defense counsel asked A.M. about her interview with the detective. In response to defense counsel's leading questions, A.M. confirmed that she had described to him the details of what happened during the assault. She also confirmed that he asked her questions about things that happened prior to the assault and that she "gave truthful answers to all of his questions."
126 At this point, defense counsel approached the bench and, citing CRE 608(b), requested permission to examine A.M. about her not being truthful during the interview "about having been arrested for narcotics, and what those narcotics were." The trial court denied counsel's request, ruling that A.M.'s narcotics arrest was not probative of . her "veracity or truthfulness" and noting that she "was ultimately never charged" or con-viected of possessing narcotics.
§27 Defense counsel explained that she wanted to question AM. "not so much [about] the arrest itself," but about her untruthful answers to specific questions during the interview. The court responded that "the only instance that you have given me is having to do with the narcotics. It's a backdoor way of getting ... to what ... would not be permitted under Rule 608(b), so the request is denied."
28 Subsequently, defense counsel sought permission to cross-examine the detective about "whether or not [A.M.] was completely forthcoming in all of her answers to his questions." She did not, she said, intend to ask what those questions were; however, she believed that AM.'s "truthfulness, or her forthrightness with the detective during the course of the interview is relevant." She indicated that her request, at this point, was not based on CRE 608(b),
[29 The court precluded the desired questioning of the detective, ruling, in pertinent part:
I think this is trying to take a drug issue-while she may or may not to [sic] take a drug issue and bring it in, under 608(b); furthermore, under Rule 401, 403, if I permit that questioning, that leaves the inevitable question of: What was she untruthful about? Something on the [date of the assault] or some other issue? And this invites jury speculation.
And I think that, then, both sides were left with either a jury speculating about what was-or having to get into drug use or the arrest for. drugs. So I see it as a situation where, under 401 and 403, even to the extent that this may be an instance that could be encompassed by [People v.] Segovia, [196 P.3d 1126 (Colo.2008),] which I really don't believe, but even if it was, then it would-then under 401 and 408, it would simply invite speculation.
1830 On appeal, defendant contends that the trial court violated his constitutional right of confrontation by unduly restricting his right to cross-examine witnesses, in contravention of CRE 608(b) and his independent right to contradict A.M.'s trial testimony.
131 Initially, we note that, by her requests, defense counsel properly preserved
A. CRE 608(b)
€32 Under CRE 608(b), a witness may be cross-examined about specific instances of conduct that are probative of the witness's character for truthfulness or untruthfulness, but extrinsic evidence (eg., evidence from another witness) may not be used to prove that conduct. Segovia
33 In Segovia, the supreme court recognized that providing false information to a police officer is, for CRE 608(b) purposes, probative of a witness's untruthfulness.
34 A trial court has discretion, however, to exclude CRE 608(b) evidence on CRE 408 grounds. posed inquiries of a witness under CRE 608(b) are subject to CRE 403 limitations); see also People v. Lesslie,
{35 "'[Dliseretion is abused only where no reasonable person would take the view adopted by the trial court,. If reasonable persons could differ as to the propriety of the action taken by the trial court, then it cannot be said that the trial court abused its discretion.' " People v. Hoover,
136 A trial court should "exclude evidence that has little bearing on credibility, places undue emphasis on collateral matters, or has the potential to confuse the jury." People v. Knight,
137 As the court noted, defendant's proposed inquiry of A.M. raised the issue of her narcotics arrest. Notably, defendant did not argue before the trial court, and has not argued on appeal, that A.M.'s arrest had any independent significance, ie., demonstrating
[38 Thus, that A.M. was arrested on another occasion for a narcotics offense would not have been independently admissible in the present case. See People v. Pratt,
139 Because the subject of the nareotics arrest raised a collateral issue, the trial court acted within the range of permissible choices in precluding defendant from inquiring of AM. whether she had been truthful to the detective on that subject. See generally People v. Taylor,
B. Contradicting A.M.'s Trial Testimony
140 In the trial court, defense counsel asserted that she was entitled to introduce evidence from the detective that would con-tradiet A.M.'s testimony that she had been completely truthful with him.
T41 "Impeachment by contradiction consists of counterproof that something said by the witness is not accurate. Contradiction may be achieved," as pertinent here, through the "use of extrinsic evidence." 88A Federal Procedure: Lawyers Edition. § 80:181, at 222-28 (Thomson West 2003). However, "[elxtrinsic evidence is generally inadmissible to contradict a witness' testimony on a collateral matter." People in Interest of K.N.,
11 42 As noted above, the ultimate object of defendant's desired questioning-whether A.M. had been truthful with respect to her previous arrest for a narcotics offense-was
T 43 Nor, in our view, did the court abuse its discretion in precluding defendant's attempt to elicit from the detective evidence that A.M. had been untruthful without identifying the precise subject of that untruthfulness. In the first instance, such an inquiry would be improper because testimony that another witness or the defendant is or was being truthful or untruthful on a particular occasion is inadmissible. See Liggett v. People,
[ 44 Because defendant's proposed inquiry raised the prospect of either unduly maligning the character of A.M. or leaving the jury to speculate about what A.M. may have lied about, we perceive no abuse of the court's discretion in precluding it.
C. Confrontation
145 The right to confront and cross-examine witnesses is not. absolute. See People v. Saiz,
1 46 Having concluded that the trial court acted within its discretion to preclude the questioning of A.M. or the detective on collateral matters, we discern no violation of defendant's constitutional right to confront adverse witnesses. Ree People v. Hogan,
IV. Prosecutorial Misconduct
[ 47 We also reject defendant's contention that reversal is required because of prosecu-torial misconduct in closing argument.
148 On appeal, defendant argues that the prosecutor improperly (1) expressed her per
49 To qualify as plain error, an error must be both "obvious and substantial." Hagos v. People,
150 Prosecutorial misconduct in closing argument rarely constitutes plain error. Ujaama, 170. "
A. AM's Truthfulness
151 Defendant argues that the prosecutor improperly vouched for A.M.'s truthfulness by telling the jury that A.M. "told you the truth" and gave "very core truthfi details," ~ "
$52 "[A] prosecutor cannot communicate her [personal] opinion on the truth or falsity of witness testimony during final argument." Domingo-Gomez v. People,
153 "In cases. that turn on the eredi-bility of witness testimony, the line between argument about whether the jury can rely on the testimony of witnesses and improper expressions of personal opinion becomes hard to draw." Domingo-Gomez,
§54 In her initial closing argument, the prosecutor said:
[Alsk yourselves this big question: What motivation does she have to make this up? You haven't heard a thing. What motivation does she have to come in? There is no evidence, because there is none. She came in and told you the truth.
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What is her motivation to go through, starting with the SANE exam which was voluntary, and ending in the culmination with her in this courtroom? What is the motivation? * There is none. And why not make up something a lot better if she's going to do it, right? I mean, why talk to you about pants coming down around her knees? Why not say: They threw me down; they stripped off all my clothes? She's giving you those very core, truthful details that she remembers. And some of it's not pretty. She has to [sic] admitted, "No, I don't remember what we were talking about. No, I don't remember one of those bars. No, I don't remember a lot of this stuff,". Why not fill that in if she's not being honest with you? It adds to her. credibility. And even after all of this, she continues to be cooperative.
(Emphases added).
4 55 We perceive no error,. The context in which the prosecutor used the potentially problematic words "truth" and "truthful"-ie., (1) that there was no evidence that A.M. had a motive to lie and (2) that A.M.'s ability to remember specific core details while admitting that she was unable to remember others indicated she was telling the truth-reveals that the prosecutor was drawing reasonable inferences from the evidence rather than professing her personal opinion as to A.M.'s veracity. See id. (Although the language used by the prosecutor-that defendant "did not tell you the truth" and "Thie was not truthful with you"-*"was susceptible to being considered a personal opinion," the
156 Moreover, even if the comments were improper, they did not so undermine the trial's fundamental fairness as to cast serious doubt on the reliability of the verdicts. The comments made up a small part of the prosecutor's closing argument, during which the prosecutor fairly summarized the evidence, and provided reasons, based on the evidence, why the jury should believe A.M.'s allegations. Further, the trial court provided the jury with a proper credibility instruction, and, at one point during closing, reminded the jury that the arguments of counsel were not evidence.
157 Under these cireumstances, plain error did not occur. See People v. Villa,
B. Confirming the Plausibility of A.M.'s Testimony
158 Defendant also argues that, in rebuttal closing, the prosecutor improperly suggested matters external to those presented in court that female jurors should consider in deciding whether A.M.'s story was plausible:
I want you to think about the vaginal trauma [A.M.] had. Here's the hard conversation: You go back in that jury room, and you have nine women currently on this jury. Why don't you have a hard conversation about how many of them have suffered vaginal trauma from a consensual sexual encounter, You have a hard conversation about that.
You're here to have hard conversations. You were asked about-[defense counsel], in closing, talks about the relative positions of these people. Really? You think about her pants down around her knees, You need to go in that bathroom and take in {[sic] your pants down to your knees. And you see, if they wanted to, could jam an erect penis into a woman's vagina? You bet they can. They did. DNA evidence tells you exactly that.
159 Initially, defendant asserts that the prosecutor's suggestion that the jurors have a "hard conversation" about their own sexual experiences played to the passions of the jury and likely made them uncomfortable. Because of the role jurors play in our justice system, they can be expected to be "uncomfortable" and to have "hard conversations" about the hard decisions they are required to make: "At times, the decisions we ask jurors to make are particularly difficult and carry with them enormous consequences." People v. Kasim,
T 60 Consequently, we perceive no error in the prosecutor's phrasing her requests in terms of asking the jury to "have a hard conversation."
161 The issue, in our view, is whether the objects of the prosecutor's requests were proper-that is, whether the prosecution could ask female jurors to (1) consider their life experiences in determining whether A.M.'s vaginal trauma was attributable to consensual or nonconsensual sex and (2) conduct a bathroom "experiment" to determine if a sex assault could have occurred as A.M. said it did.
1 62 We conclude that the prosecutor could properly make the first request, and that plain error did not occur as a result of the second.
163 We base our conclusion, with regard to the vaginal trauma issue, on the undisputable proposition that "jurors may apply their general knowledge and everyday experience when deciding cases." Kendrick v. Pippin,
164 As to the bathroom "experiment," the issue is whether the prosecutor invited the jury do something that was improper. She did.
T65 "'A jury cannot properly consider information from an outside source, not presented during the course of the trial'" People v. Thompson,
166 Juror experiments may result in the discovery of new evidence in addition to that which was presented in court. See generally People v. Collins,
[The relevant inquiry is whether the experiment or investigation made by the jury can be said to be within the seope or purview of the evidence introduced at trial. If so, the actions of the jurors are not improper. It is only if their activity is the equivalent of the reception of additional evidence that they may be said to have engaged in misconduct.
Thompson,
1 67 In determining whether a jury "experiment" would be improper, we recognize that
*970 [JJurors do not live in capsules. It is not expected that jurors should leave their common sense and cognitive functions at the door before entering the jury room. Nor is it expected that jurors should not apply their own knowledge, experience, and perceptions acquired in the everyday affairs of life to reach a verdict.
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[Thus,] reenactments in the jury room based on the- jury's recollection of the testimony are usually allowed as an application of the jury's common sense and deductive reasoning to determine the truth of the facts in dispute....
Bennett L. Gershman, Contaminating the Verdict: The Problem of Juror Misconduct, 50 S.D. L.Rev. 322, 331, 333 (2005); see State v. Pease,
168 "A prosecutor is afforded considerable latitude in replying to an argument by defense counsel." People v. Wallace,
T 69 Under the cireumstances, the prosecutor was entitled to respond to defense counsel's argument that A.M.'s account of the assault was essentially physically impossible by inviting the jurors to evaluate this claim of impossibility themselves through a reenactment. See United States v. Avery,
170 Assuming the prosecutor's suggestion was otherwise appropriate (and we conclude below that it was not appropriate), a "reenactment" of the sort proposed here might not constitute or result in extraneous evidence, but could constitute the jurors merely taking advantage of their own personal experience and knowledge to test whether A.M.'s description of events was physically possible. See Pease,
T71 Defendant asserts that the prosecution's remarks did not actually call for a reenactment of events as described by A.M., and, consequently, created the possibility that extraneous evidence would be injected into the case. According to him, the prosecutor's remarks invited the jury to determine whether a man could "'jam' an erect penis into the vagina of a juror standing in a bathroom stall with her pants around her knees," a cireumstance wholly irrelevant to the facts of the case. However, by referencing "the relative positions of these people," as argued by the defense, the prosecutor provided the context for the proposed reenactment-that the jurors perform it as A.M. described it, squatting with their backs against a wall.
72 Nonetheless, the prosecutor's request was improper. In the first instance, any suggestion or request by a prosecutor or defense attorney that jurors of either sex remove their clothing and contort their naked bodies into the position that the victim testified she was in at the time of the alleged assault, is patently offensive to the jurors themselves. In the second, it is problematic, to say the least, to invite some members of the jury to re-enact described events, out of the jury room, and out of the presence of the remaining jurors.
T73 Defendant asserts that the prosecutor's invitation here "encouraged the jurors to violate their oath to deliberate only when all twelve jurors were together in the jury room." However, the principle of deliberations by a full jury is not contravened every time one or more of the jurors makes an appraisal of the evidence apart from other jurors in the case. See Collins,
T74 But merely because a juror may do something outside the presence of other jurors does not mean that a prosecutor may encourage the juror to do so. Indeed, a prosecutor should not encourage jurors to engage in out-of-jury room experiments. See Moore,
T 75 However, we further conclude, for the following reasons, that the prosecutor's suggestion, though improper, was not plain error. ,
176 First, the error was not obvious. For error to be "obvious," the action challenged on appeal must ordinarily contravene (1) a clear statutory command; (2) a well-settled legal principle; or (8) Colorado case law. Pollard, 140. Eventhough we have now determined that the request by the prosecutor was improper, prior to the issuance of this opinion, no statute, well-settled principle, or Colorado case disavows this type of problematic request to a jury. Thus, the argument was not "flagrantly, glaringly, or tremendously improper," for purposes of qualifying as plain error. See People v. Conyac,
177 Further, the error was not "seriously prejudicial" to defendant. There is no indication in the record that the proposed reenactment was carried out by members of the jury. And, even if had been, it would not, for the reasons and authorities cited above, have resulted in the injection of impermissible ex
78 Because no plain error occurred, reversal is not warranted.
V. Correction of Mittimus
179 Finally, defendant contends, the People concede, and we agree, that the mitti-mus must be corrected. Defendant's mitti-mus erroneously reflects that he was convict, ed of four counts of sexual assault. Although, at one point, he was charged with four counts of sexual assault, two of those counts were dismissed before trial; he was convicted on only the remaining two counts. A remand is necessary, then, to allow the trial court to correct the mittimus to reflect the correct number of his convictions for sexual assault. See People v. Malloy,
VI. Conclusion
180 The judgments of conviction are affirmed, but the case is remanded to the district court for correction of the mittimus consistent with the views expressed in this opinion,
. The prosecution took a different view of the very same scene, portraying it as depicting the friend as "grabb[ingl" A.M. and "physically pushing" her into the elevator.
. There was apparently, however, no camera covering the area of the parking garage in which the sexual assaults were alleged to have occurred.
. She said: "I'm not sure [CRE 608(b)] applies. I'm not satisfied with subsection B[sic]."
. There are three generally recognized categories of noncollateral facts: facts that are admissible to prove substantive issues in the case; facts that are admissible to impeach or disqualify the witness on grounds other than contradiction (eg., bias); and any part of the witness's account of the background and circumstances of a material transaction which as a matter of human experience he would not have been mistaken about if his story were true (e.g., the fact that the accident at issue occurred during a blizzard on a moonless night, rather than on a sunny day as the witness described). See 27 Charles Alan Wright, Kenneth W. Graham, Jr., Victor James Gold & Michael H. Graham, Federal Practice & Procedure: Federal Rules of Evidence § 6096, at 659-62 (2d ed. 2014).
. There is one exception to this rule: extrinsic evidence is admissible to contradict a criminal defendant's testimony about a collateral matter. See Federal Practice & Procedure § 6096, at 655; see also People v. Thomas,
. In reaching our decision, we necessarily reject, as misplaced, defendant's reliance on impeachment cases that did not involve collateral matters. See, e.g., Banek v. Thomas,
. See also, eg., People v. Cole,
