OK, first of all, I completely take your point about the misuse of certain words; for instance, decimation and literally have changed meanings. However I was speaking in the context of which it's popularly used.
So you are continuing and discussing your idea based around the hijacked misuse of the words?
If you are basing your argument on misuse of words and inaccurate things then perhaps you do believe there never had been a proven conspiracy theory. Religions like to misuse words and dwell in absolutes as well.
If you look at the definition of the word there have been MANY conspiracy theories that turned out to be true going way back in history.
I will agree that MOST conspiracy theories are not proven to be true.
I will not agree to the absolute of ALL or NEVER though (you used EVER). All it takes is one case where that is not true for the absolute to be dead where it was written or said. There are far more than one that have been proven.