If I refute a view that isn't your view and claim to have refuted you, then I have committed the "straw man" fallacy.

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Quizplus · Accepted Answer

The straw man fallacy occurs when someone misrepresents or distorts an opposing argument in order to make it easier to attack, rather than addressing the actual argument being presented. Claiming to have refuted someone's argument when in fact the argument being criticized is not actually their argument is a common example of the straw man fallacy.

If I Refute a View That Isn't Your View and Claim