What is the test for establishing that a non-moving party has a valid argument to support its claim against the opposing party?

"In evaluating the evidence to determine whether there is a genuine issue of fact," the court draws "all reasonable inferences supported by the evidence in favor of the non-moving party." Walls, 653 F.3d at 966. Because the court only considers inferences "supported by the evidence," it is the non-moving party's obligation to produce a factual predicate as a basis for such inferences. See Richards v. Nielsen Freight Lines, 810 F.2d 898, 902 (9th Cir. 1987). The opposing party "must do more than simply show that there is some metaphysical doubt as to the

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