What is the basis for a finding of ineffective assistance of counsel at the preliminary hearing of an assault charge?

In his filing, Rivera asserts that he received ineffective assistance of counsel at the preliminary hearing because his defense counsel failed to present his defenses that (1) Rivera acted in self-defense because the victim was intoxicated and had antagonized him; and (2) he suffers from a substance abuse issue, which should have mitigated his sentence. Appellate counsel has also identified as an issue that "might arguably support the appeal" (Anders, supra, 386 U.S. at p. 744) that "the trial court erred in denying appellant's request to replace his appointed counsel pursuant to People v. Marsden, supra, 2 Cal.3d 118." Competent counsel has represented Rivera on this appeal, and we have

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considered these issues and conclude they do not raise any reasonably arguable issue for reversal on appeal.