Maby some are hard to proove wrong. But they are just very unlikely to be true without anyone revealing it as a fact.
Discussion
So you still don't know who, why and when the term "conspiracy theory" was invented?
"A conspiracy theory is an explanation for an event or situation that asserts the existence of a conspiracy by powerful and sinister groups, often political in motivation,[3][4][5] when other explanations are more probable."
Quote from wikipedia: