JERRY E. SMITH, Circuit Judge:

The district court granted habeas corpus relief to David Morales after his claim had been denied on the merits in state proceedings. The state appeals, urging that the relitigation bar in the Antiterrorism and Effective Death Penalty Act of 1996 ("AEDPA"), 28 U.S.C. § 2254(d), forbade the court to disregard the state courts' factual findings and legal conclusions. We agree, so we reverse and render a judgment of dismissal.

I.

Morales was convicted of one count of aggravated sexual assault of a child and one count of indecency with a child and sentenced to thirty-five years on the first count and twenty on the second. The complaining witness, E.O., testified that when she was six years old, Morales lured her into a bathroom, where he touched and penetrated her vagina with his index and middle fingers.

At his trial almost nine years later, Morales was represented by Charles Roberts and Angelina Lugo. The trial court was unable to impanel a jury on its first attempt. During the second attempt,

State v. Morales, 253 S.W.3d 686, 689 (Tex. Crim.App.2008).

Roberts used all ten of his peremptory strikes, plus an eleventh on a potential alternate juror. That left eighteen potential jurors, so the state used only three strikes, plus one on an alternate. Neither side used a strike on Wyatt, who served as the presiding juror. Because Roberts failed to strike Wyatt, he did not preserve error, if any, on the denial of his challenge for cause. Id.

Morales moved for a new trial alleging, as relevant here, that his trial attorneys provided ineffective assistance of counsel ("IAC") when they failed to preserve error by declining to use a peremptory challenge against Wyatt.

Id. at 689-90 (second, fourth, and fifth alterations in original).

The trial court held a hearing, during which Roberts testified that he understood the procedure for preserving error and had no strategic justification for leaving Wyatt on the jury. "It was a decision that I kind of made in a vacuum," he said. "[B]ecause I had decided that she would be struck anyway, I never — I made the mistake of never, ever looking at her sheet." Roberts assumed that Lugo would look at her questionnaire, conceded on cross-examination that he "did make a decision that day, clearly, to not strike her," but could not "really understand how we left her on the jury." For any defense counsel to leave "a lawyer for the State" on a criminal jury, he opined, was "per se, ineffective assistance of counsel." Id. at 690.1

The state called Judge Sam Medrano, Jr., who testified concerning a conversation he had with Roberts while the jury was deliberating. The two wondered why the jury had been deliberating for so long. "[W]hen a prosecutor is the presiding juror," Medrano told Roberts, "I would assume it's going to take a while before they come back with questions or a verdict[.]" Id. According to Medrano,

Id. at 690-91 (second alteration in original). As Medrano remembered their conversation, Roberts told him that "he had taken into account the fact that she was a prosecutor and made a decision to leave her on as a juror." Id. at 691.

Roberts was recalled to the stand and admitted that Medrano accurately recounted their conversation. He acknowledged he had decided not to strike Wyatt but insisted he had not had extensive discussions about it beforehand with Lugo. As to the explanation he offered the judge — "I think I was less than candid to Judge Medrano because I wasn't testifying and I wasn't — I was just trying to put the best face on it that I could." Id. The trial court denied Morales's motion for a new trial.

On appeal, Morales argued that the trial court erred in denying his challenge to Wyatt for cause and that his counsel provided IAC by failing to use a peremptory strike to preserve the issue. The appeals court held that Morales had waived the challenge for cause but that Wyatt should have been disqualified under the "implied bias" doctrine, that his counsel rendered IAC by failing to preserve the error, and that Morales suffered prejudice ("trial before a partial jury") as a result. Id. at 691-92. The court focused on the concurring opinion in Smith v. Phillips, 455 U.S. 209, 221, 222, 102 S.Ct. 940, 71 L.Ed.2d 78 (1982), in which Justice O'Connor, writing only for herself, maintained that "some extreme situations ... would justify a finding of implied bias. Some examples might include a revelation that the juror is an actual employee of the prosecuting agency[.]"

The Texas Court of Criminal Appeals ("TCCA") reversed. Assuming arguendo that Wyatt was challengeable for cause under the implied-bias doctrine, the court reasoned that trial counsel could have made a legitimate strategic decision to forgo such a challenge in return for a more favorable jury overall. Morales, 253 S.W.3d at 692. The court held that

Id. at 696. The right to an impartial jury, reasoned the TCCA, is a waivable right, subject to legitimate strategic considerations. If defense counsel can legitimately choose to impanel a juror who is actually biased against the defendant, see Delrio v. State, 840 S.W.2d 443, 445-46 (Tex.Crim. App.1992), they could choose to impanel one who is only impliedly biased, Morales, 253 S.W.3d at 698.

The court then considered the hearing testimony, especially Roberts's statement to Medrano that they were "comfortable" leaving "as fair a prosecutor as they've ever dealt with" on the jury. From this, "the trial court could rationally infer that [Morales's] trial attorneys made a difficult tactical decision to leave Wyatt on the jury" and could have credited Medrano's testimony while finding Roberts's and Lugo's incredible. "Reviewing courts," the court noted, "are bound to defer to such implicit findings of fact." Id. Therefore, because trial counsel legitimately could have made a strategic choice to leave Wyatt on the jury, and because it was required to defer to the trial court's factual determination that Morales's attorneys had done so, the court concluded that the failure to use a peremptory strike did not amount to IAC. Id. at 698-99.

Morales next applied for state postconviction relief, arguing, again, that Roberts and Lugo had rendered IAC. The state habeas court concluded that Morales's argument was barred because it had already been raised and rejected; in the alternative, the court held that trial counsel were not deficient. Of particular importance, the court found "not credible Attorney Robert's [sic] affidavit and new-trial testimony, in which he asserted that he did not view Wyatt's questionnaire and had no strategic reason for leaving her on the jury."2 Contrariwise, the court found "credible the Honorable Judge Medrano's account of the discussion that transpired between him and Attorney Roberts regarding trial counsels' decision to leave Wyatt on the jury." "The record," according to the court, "reflects that trial counsel had a strategic reason for leaving Wyatt on the jury." The TCCA adopted the habeas court's findings of fact and conclusions of law without opinion.

Morales applied for habeas relief under 28 U.S.C. § 2254, which the district court granted. The court acknowledged the TCCA's deference to the trial court's finding that Morales's counsel had made a "difficult tactical decision" not to strike Wyatt from the jury, but it disagreed with the TCCA's conclusion that that was a reasonable finding of fact. In particular, the district court credited "the admissions by both of Morales's trial counsel that they erred when they failed to review Wyatt's juror information sheet and failed to preserve the trial court's error," and it also credited "the assertions by Morales's attorneys that they had no strategic reasons for their deficiencies." Therefore, the district court found "that the state courts' decision — `was contrary to, or involved an unreasonable determination of, clearly established Federal law ... or ... was based on an unreasonable determination of the facts in light of the evidence presented in the State court proceeding.'" The state appeals, urging that the district court impermissibly disregarded AEDPA's relitigation bar, 28 U.S.C. § 2254(d).

II.

"In reviewing a grant of habeas relief, we examine factual findings for clear error and issues of law de novo." Barrientes v. Johnson, 221 F.3d 741, 750 (5th Cir.2000). "When examining mixed questions of law and fact, we also utilize a de novo standard by independently applying the law to the facts found by the district court, as long as the district court's factual determinations are not clearly erroneous." Id.

III.

To show IAC, Morales must satisfy both the performance and prejudice prongs of Strickland v. Washington, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984). First, he must demonstrate that Roberts and Lugo "made errors so serious that counsel was not functioning as the `counsel' guaranteed the defendant by the Sixth Amendment." Id. at 687, 104 S.Ct. 2052. Second, he must show that those "errors were so serious as to deprive the defendant of a fair trial, a trial whose result is reliable." Id. Reviewing courts must avoid scrutinizing counsel's performance too stringently: "It is all too tempting for a defendant to second-guess counsel's assistance after conviction or adverse sentence, and it is all too easy for a court, examining counsel's defense after it has proved unsuccessful, to conclude that a particular act or omission of counsel was unreasonable." Id. at 689, 104 S.Ct. 2052. The court must "evaluate the conduct from counsel's perspective at the time. Because of the difficulties inherent in making the evaluation, a court must indulge a strong presumption that counsel's conduct falls within the wide range of reasonable professional assistance[.]" Id.

When a state court has already adjudicated a Washington claim on the merits, the district court may not consider the question de novo. Instead, AEDPA's relitigation bar requires that the petition be denied unless the state adjudication (1) "resulted in a decision that was contrary to, or involved an unreasonable application of, clearly established Federal law, as determined by the Supreme Court of the United States" or (2) "resulted in a decision that was based on an unreasonable determination of the facts in light of the evidence presented in the State court proceeding." 28 U.S.C. § 2254(d).

"[T]he phrase `clearly established Federal law, as determined by the Supreme Court of the United States' . . . refers to the holdings, as opposed to the dicta, of [Supreme Court] decisions as of the time of the relevant state-court decision." Williams v. Taylor, 529 U.S. 362, 412, 120 S.Ct. 1495, 146 L.Ed.2d 389 (2000). A state court decision is "contrary to" clearly established Federal law "if it reaches a legal conclusion in direct conflict with a prior decision of the Supreme Court or if it reaches a different conclusion than the Supreme Court based on materially indistinguishable facts." Gray v. Epps, 616 F.3d 436, 439 (5th Cir.2010). "[A]n unreasonable application of federal law is different from an incorrect application of federal law." Williams, 529 U.S. at 410, 120 S.Ct. 1495. "[I]t is not enough to convince a federal habeas court that, in its independent judgment, the state-court decision applied [Washington] incorrectly. Rather, [the petitioner] must show that the [state court] applied [Washington] to the facts of his case in an objectively unreasonable manner." Bell v. Cone, 535 U.S. 685, 699, 122 S.Ct. 1843, 152 L.Ed.2d 914 (2002) (internal citation omitted).

"With respect to the review of factual findings, AEDPA significantly restricts the scope of federal habeas review." Brown v. Dretke, 419 F.3d 365, 371 (5th Cir.2005). The petitioner must show that the factfinder's decision was objectively unreasonable, "a substantially higher threshold" than showing the decision was merely "incorrect or erroneous." Blue v. Thaler, 665 F.3d 647, 654-55 (5th Cir. 2011). "[A] state-court factual determination is not unreasonable merely because the federal habeas court would have reached a different conclusion in the first instance." Wood v. Allen, 558 U.S. 290, 301, 130 S.Ct. 841, 175 L.Ed.2d 738 (2010). Furthermore, under 28 U.S.C. § 2254(e), the factual determinations of the state court "shall be presumed to be correct." Morales bears "the burden of rebutting the presumption of correctness by clear and convincing evidence." Id.

Washington claims are particularly difficult to win under AEDPA's relitigation bar.

Harrington v. Richter, ___ U.S. ___, 131 S.Ct. 770, 788, 178 L.Ed.2d 624 (2011) (internal citations omitted). "If this standard is difficult to meet, that is because it was meant to be." Id. at 786.

The state argues that the district court erred in two ways: First, it unjustifiably disregarded the state courts' factual determination that Roberts and Lugo made a strategic decision to leave Wyatt on the jury; second, without identifying any controlling Supreme Court precedent, it concluded that trial counsel were constitutionally ineffective in failing to preserve an objection that no Texas court had ever accepted. The state contends that Roberts and Lugo did not render IAC and, in the alternative, that the Texas courts were not objectively unreasonable by so concluding.3

A.

The central question is whether the state courts' factual finding4 — that Roberts and Lugo made a strategic and tactical decision to keep Wyatt on the jury rather than seat the Republican college graduate or roll the dice with a new jury pool — was objectively unreasonable in light of the evidence presented in the state court proceedings. The district court erred on this point: Although it offered six reasons for disagreeing with the TCCA's conclusion that the trial court's implicit fact findings were reasonable,5 its reasons are unpersuasive.

Four of those reasons are irrelevant to the factual issue. First, the district court offered "Justice O'Connor's warning that an actual employee of the prosecuting agency was impliedly biased[.]" See Smith, 455 U.S. at 222, 102 S.Ct. 940 (O'Connor, J., concurring). Whatever the relevance of Justice O'Connor's warning to the TCCA's legal conclusion, it offers no insight into the factual question whether Roberts and Lugo made a strategic choice. Second, similarly, "the trial court's ... denial of Morales's challenge for cause" has nothing to do with the findings of fact. Third, the intermediate appellate court's opinion, which the district court considered "well-reasoned and legally correct," did not even address whether trial counsels' failure to use a peremptory strike was a tactical choice. See Morales v. State, 217 S.W.3d 731, 735-36 (Tex.App.-El Paso 2007). Fourth, that Morales moved for a new trial based on IAC does not mean his factual and legal assertions were correct.

The only relevant reasons offered by the district court were that trial counsel had admitted they had not reviewed Wyatt's juror questionnaire and failed to preserve error and that they had asserted they had no strategic reason for doing so. Those admissions and assertions were only half the evidence that the state courts considered when making their factual findings; they also considered Medrano's contradictory testimony, which they credited implicitly and explicitly. Even if the parties contradicted each other on every point during the new-trial hearing, the state courts would not have been "objectively unreasonable" to believe one party over another about a he-said, she-said disagreement.

AEDPA does not allow federal habeas courts to gainsay state courts' assessments of credibility on a cold paper record.6 In this case, though, Roberts admitted that Medrano had described their conversation accurately but explained that he had been "less than candid[.]" Morales, 253 S.W.3d at 691. The state courts' factual finding did not require them, therefore, to decide which of two witnesses was more credible, but instead whether Roberts was telling the truth to a sitting judge before he lost his case or truthfully testified under oath at a hearing attempting to give his client another trial. Nothing about the state courts' findings of fact was objectively unreasonable in light of the evidence before them.

B.

Once we accept the state courts' findings of fact, the issue is whether Roberts and Lugo rendered IAC by making a difficult strategic choice to seat Wyatt rather than preserving Morales's implied bias challenge, or, more accurately, whether the state courts' conclusion that they were not constitutionally ineffective was contrary to or an unreasonable application of clearly established federal law. Both courts that have granted habeas relief to Morales have focused on Justice O'Connor's opinion in Smith, 455 U.S. at 221, 102 S.Ct. 940, in which she argued that the doctrine of implied bias was justified in "extreme situations," which might include the revelation that a juror was employed by the prosecuting agency, id. at 222, 102 S.Ct. 940.

The state argues extensively that the implied-bias doctrine was not controlling precedent during Morales's trial, that it was not clearly established federal law as determined by the Supreme Court, and that, in any case, Justice O'Connor's solo concurrence could not bind the TCCA. This court has held, however, "that the doctrine of implied bias is clearly established Federal law as determined by the Supreme Court." Brooks v. Dretke, 444 F.3d 328, 329 (5th Cir.2006) (internal quotation marks omitted).7 We need not decide whether the state's contentions are correct; the TCCA held that Roberts and Lugo did not render IAC even assuming that "the Sixth Amendment embraces the doctrine of implied bias ... [and that] the implied bias doctrine would require the exclusion from jury service of a prospective juror who is an employee of the prosecuting agency, as Wyatt was." Morales, 253 S.W.3d at 696. If the TCCA's decision was contrary to clearly established federal law, it was not for failure to recognize the implied-bias doctrine.

In summary, the TCCA determined that trial counsel did not render IAC, because the right to an impartial jury "is subject to waiver ... [and] subject to the legitimate strategic or tactical decision-making processes of defense counsel during the course of trial," and Roberts and Lugo made a legitimate tactical decision to leave Wyatt, a fair prosecutor with whom they felt comfortable, on the jury. Id. at 697-98. Neither Morales nor the district court points to any Supreme Court holding that contradicts the TCCA's reasoning, nor have we discovered one. For that and three additional reasons, the TCCA's holding was not contrary to or an unreasonable application of clearly established federal law.

First, on multiple occasions, this court has concluded that attorneys did not render IAC when they decided for strategic reasons not to strike potential jurors who admitted they were "probably" biased against the defendant. In Torres v. Thaler, 395 Fed.Appx. 101, 107-08 (5th Cir. 2010) (per curiam), defense counsel decided not to use a for-cause or peremptory strike against a potential juror who "thought his experiences would affect his impartiality and that he would `probably' be more for the State[.]" The state habeas court had found that counsel made a strategic decision to seat the juror and did not render IAC. This court held that the state court's application of federal law was not objectively unreasonable. Id. at 108.8 If it is not IAC to decide, strategically, not to strike a potential juror who admits to being probably or possibly biased against the defendant, it would not be IAC to decide, for tactical reasons, not to strike a potential juror who is merely impliedly biased against the defendant but whom counsel thought to be fair and who swore that she could be fair and impartial.

Second, the state points out that "it is `clearly established' that the Sixth Amendment's Confrontation Clause bars the introduction on [sic] testimonial hearsay from absent declarants." See Crawford v. Washington, 541 U.S. 36, 53-54, 124 S.Ct. 1354, 158 L.Ed.2d 177 (2004). Nonetheless, defense counsel does not render IAC by strategically forgoing a Crawford objection.9 To be sure, deciding to seat a biased juror, even an impliedly biased juror, is a much weightier decision than is deciding not to object to out-of-court statements read by the prosecutor during sentencing. See id. But neither Morales nor the district court identifies a Supreme Court case, nor have we found one, holding that the Sixth Amendment right to an impartial jury, unlike the right to confront witnesses, is unwaivable.

Third, Virgil v. Dretke, 446 F.3d 598 (5th Cir.2006), holding that trial counsel was constitutionally ineffective for failing to challenge actually biased jurors for cause, despite the state court's decision to the contrary, is distinguishable but instructive. Petitioner contended "that his counsel was constitutionally deficient in failing to challenge for cause the five challenged jurors who were `actually and admittedly' biased." Id. at 608. As to three, their "limited and natural response" to a single question — "that they could not fairly consider the testimony of a person with a prior conviction" — was "insufficient to raise any obligation on the part of counsel to respond with a peremptory or for-cause challenge." Id. at 608-09. As to the remaining two, their admissions that they could not be "`fair and impartial' obligated [defense] counsel to use a peremptory or for-cause challenge ... [and failure to do] so was deficient performance under [Washington]." Id. at 610. "Moreover," the court reasoned, counsel's post-hoc explanation "fail[ed] to rehabilitate his performance" and "lack[ed] any suggestion of a trial strategy for not using peremptory or for-cause challenges on [the biased jurors.]" Id. "In light of the statements of [the jurors] and absent some explanation for keeping them on the jury, we consider counsel's failure to use a peremptory or for-cause challenge ... to be constitutionally deficient." Id. (emphasis added). The court also rejected as unpersuasive the state's alternative explanations of counsel's potential strategy. Id. at 610-11.

By implication, trial counsel, making a reasonable tactical decision, could elect to seat an actually biased juror without rendering IAC.10 That is even more true, then, where the juror was only impliedly biased, was known personally by counsel, who thought her fair, and where counsel attempted a for-cause challenge, but then was forced to decide whether to preserve a challenge no Texas court had ever used to overturn a conviction at the cost of allowing a Republican on the jury. A "conscious and informed decision on trial tactics and strategy cannot be the basis for constitutionally [IAC] unless it is so ill chosen that it permeates the entire trial with obvious unfairness." Virgil, 446 F.3d at 608. The state courts' conclusion — that trial counsels' decision to seat Wyatt did not permeate the entire trial with obvious unfairness — is not contrary to or an unreasonable application of any Supreme Court holding of which we are aware.

The judgment granting habeas relief is REVERSED, and a judgment of dismissal is RENDERED in favor of the state.