What is the difference between factual evidence and opinion evidence in patent examination?

What is the difference between factual evidence and opinion evidence in patent examination? In patent examination, the distinction between factual evidence and opinion evidence is crucial. The MPEP 716.01(c) provides guidance on this matter: The arguments of counsel cannot take the place of evidence in the record. In re Schulze, 346 F.2d 600, 602, 145…

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