> gaslight That's a loaded term, used at the outset to poison the well, so to speak, so one has to question whether the question was asked in good faith and therefore would answering be worth the trouble.
But it _is_ a careless misuse of a word that has a specific definition. Frankly, I can't remember the last time I saw it used properly.
It means "to manipulate someone by psychological means into questioning their own sanity". It's from a 1940s film where a husband convinces his wife she's going insane, by manipulating the lights in their house.