Can you name a few that come readily to mind; that did not have merit? Think the 'big ones'may remain as theories; but not ever, totally, discounted.
(Can you name any that were proven to be true? And, if not proven true then a theory has no merit beyond the amusement factor)
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"Think the 'big ones'may remain as theories; but not ever, totally, discounted."
(Theories are to be proven - not accepted unless discounted.)
I’m thinking of the conspiracy theories that the government was responsible for — or at least an active participant in — the Kennedy assassination, the attack on the World Trade Center ... you know ... the stuff George Nori has fun with (although he is entertaining if you can’t sleep!)