The few posters with a brain stem, prevent the thread from being turned into a disinformation campaign by those who are either of only average intelligence (thus not adroit with logic) or those intentionally disingenuous trolls. Which classification do you reckon applies to DooMAD?
Given that half of the human population are dumber than average, and if we estimate 25% of the population are dishonest (feel free to adjust this number, my view might be too cynical), he has 12.5% chance of being intentionally disingenuous.
Your math here made me smile, I'm not sure it is mathematically/logically possible that
half the human population be dumber than the
average 
But I do get what you're trying to say.
Anyways what I really wanted to comment about is your extremely optimistic estimate of only 25% being dishonest

I'd say it's probably closer to 99.9% if not a full 100%.