fishos , 4 hours ago

OP is inadvertantly providing another example: the phrase “conspiracy theory”. It was coined by the US government as a way to discredit ideas - to make people look like crackpots. Lots of negative propaganda was created around that phrase.

Fast forward to today and “conspiracy theory”, though admittedly still tainted in various ways, has made a resurgence. Things that would have gotten you laughed out of the room are now proven fact(like Iran-Contra, for a simple and fairly uncontroversial example).