Original sentence: A conspiracy theory is a theory proposing that well known historical or recent events were deliberately caused by a group of rich or powerful individuals conspiring to do so with the ability to cover their tracks and frame others, leaving only circumstantial evidence of their involvement
Edited sentence: A conspiracy theory is a theory that defies common historical or current understanding of events, under the claim that those events are the result of manipulations by two or more individuals or various secretive powers or conspiracies