alt Hacker News> Saying party X plans to do something
but that's not the whole thing being said.
Party X may have been planning on something, but party Y threw a wrench in the middle, causing party X to have to make some response. By implication, party X believes party Y to be throwing a wrench, hence, party X must act. Therefore, party Y also must be planning something that counteracts party X's desires. If it weren't so, party X would not act (as that costs money).
The thing that contradicts Party X's desires can just be not doing the thing Party X wants done, it doesn't have to be doing an equal and opposite thing.
This seems like a variation on the fallacy of the excluded middle.