I’ve noticed a type of fallacious argument for which I’m not able to find a recognized name. It goes something like this:
Ms. W.: You might believe hypothesis A to be true, but reject it for reasons B and C; instead accept statement D (rest of the argument elided).
Mr. S.: Ms. W. said that hypothesis A was true, but she’s wrong for reasons X and Y (rest of the argument elided; it will often completely ignore W.’s actual position).
It’s a particular way of misrepresenting one’s opponent’s argument, by attributing to her a position she has considered and explicitly rejected. (It’s usually not quite as blatant as this, of course, and it may be based on an unintentional misreading of the first argument rather than malice.)
Is there a standard term for this fallacy?