What is the legal test for admitting evidence in a civil case?

"[T]he admission of evidence, even if erroneous under state law, results in a due process violation only if it makes the trial fundamentally unfair. [Citations.]" (People v. Partida (2005) 37 Cal.4th 428, 439.) "To prove a deprivation of federal due process rights, [defendant] must satisfy a high constitutional standard to show that the erroneous admission of evidence resulted in an unfair trial. 'Only if there are no permissible inferences the jury may draw from the evidence can its admission violate due process.

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