What is the test for establishing that a judgment or order of the lower court is correct?

"'A judgment or order of the lower court is presumed correct. All intendments and presumptions are indulged to support it on matters as to which the record is silent, and error must be affirmatively shown.'" (Denham v. Superior Court (1970) 2 Cal.3d 557, 564.) "It is a basic presumption indulged in by reviewing courts that the trial court

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is presumed to have known and applied the correct statutory and case law in the exercise of its official duties." (See People v. Mack (1986) 178 Cal.App.3d 1026, 1032.)