What is the legal test for ineffective assistance of counsel?

The Sixth Amendment right to assistance of counsel includes the right to the effective assistance of counsel. (Strickland v. Washington (1984) 466 U.S. 668, 686-674; see also Cal. Const., art. I, 15.) "Generally, a conviction will not be reversed based on a claim of ineffective assistance of counsel unless the defendant establishes both of the following: (1) that counsel's representation fell below an objective standard of reasonableness; and (2) that there is a reasonable probability

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that, but for counsel's unprofessional errors, a determination more favorable to defendant would have resulted. [Citations.] If the defendant makes an insufficient showing on either one of these components, the ineffective assistance claim fails." (People v. Rodrigues (1994) 8 Cal.4th 1060, 1126.)

"Reviewing courts defer to counsel's reasonable tactical decisions in examining a claim of ineffective assistance of counsel [citation], and there is a 'strong presumption that counsel's conduct falls within the wide range of reasonable professional assistance.' [Citation.] Defendant's burden is difficult to carry on direct appeal, as we have observed: '"Reviewing courts will reverse convictions [on direct appeal] on the ground of inadequate counsel only if the record on appeal affirmatively discloses that counsel had no rational tactical purpose for [his or her] act or omission."' [Citation.]" (People v. Lucas (1995) 12 Cal.4th 415, 436-437.)