Logic and science.
"It bears repeating that fires have never caused the total
collapse of a steel-framed high-rise before or since 9/11.
Did we witness an unprecedented event three separate
times on September 11, 2001? The NIST reports, which
attempted to support that unlikely conclusion, fail to per-
suade a growing number of architects, engineers, and
scientists. Instead, the evidence points overwhelmingly
to the conclusion that all three buildings were destroyed
by controlled demolition. Given the far-reaching impli-
cations, it is morally imperative that this hypothesis be
the subject of a truly scientific and impartial investigation
by responsible authorities."
https://www.google.com/url?sa=t&sou...hDjMQFgg2MAM&usg=AOvVaw0BatGIAz6HFxH989ui7bT8
I like and value these guy's opinions more than the average Joe's.