What is the test for material evidence in a criminal case?

The phrase "material evidence" is defined as: "That quality of evidence which tends to influence the trier of fact because of its logical connection with the issue. Evidence which has an effective influence or bearing on question in issue." (Black's Law Dictionary (6th ed. 1990) p. 976, col. 2.) "[A] matter is 'collateral' if it has no logical bearing on any material, disputed issue." (People v. Contreras (2013) 58 Cal.4th 123, 152, italics added.) Here, we have already determined that the confessions are not merely "collateral." Thus, we have necessarily determined that the confessions are also "material."