The main argument against other causes was the notion that too many people would be involved to keep it secret.
Well, unless it was a accident (that was one theory - Flight 800 was shot down by a USN Standard Missile - accidentally), somebody would have claimed credit.
” the notion that too many people would be involved to keep it secret.”
Yet, illegal spying on Americans has been kept secret for decades.
It sort of isn't a secret...that's...why we're talking about it.
There were thousands of eye witnesses to JFK getting killed, and what really happened is still a secret.
The funny thing was, the results of the investigation were announced before the investigation started. Once it started, the investigators were not allowed to discuss anything with one another. They were only allowed to pass their findings upstairs. That way, no one had the full picture except the guy at the top, who had already stated what the conclusion would be.