Okay sure, I'll sum up by saying:
Logic compels me to believe in the possibility that some suspicious-looking investment scheme is not a scam.
Common sense compels me to not invest in such wacky schemes, despite the possibility of it being legit.
And I have no problem with that position. What I have a *huge* problem with is people who say things like:
"People who say "X is impossible" are amusing to me, regardless of X."
And
"It's not lacking common sense to say that something being a scam is not a complete certainty."
And
"Stuck in a loop: People who say "a legit business MUST X" are amusing to me, regardless of X.
It's like they've completely shut off the possibility that there could ever be people who know things about business that they don't know."
These are all things you said, and they are all foolish and harmful. Invoking notions of metaphysical certainty, in a conversation about anything but metaphysics, is an attempt to reject common sense and has the actual effect of causing people to make bad decisions. It is also, quite simply, wrong.
"Impossible" does *not* mean "beyond logical possibility". Buying a car that goes 300 miles per gallon of gas is not a logical impossibility, but it is also impossible. "Complete certainty" is a metaphysical concept. Its relevance to investing is nil. And "MUST" does not mean complete metaphysical certainty either.
That is all complete and harmful foolishness.