[Steve Van Doorn]

facts are relative.

Examples:
Abortion: ask them when someone becomes human. Most will say at third trimester. But not if the mother doesn't want it. Then facts are based on feelings.

Global warming: Ask them why are we worried about global warming in the coldest part of the Quaternary Ice Age at the end of our interglacial period while we are at dangerously low levels of CO2. They will look at you like they never heard any of that before and go on with some nutty ideas that we are out of the ice age when even the global alarmist don't believe that.
They drive their 'facts' based on feelings.

[Kickass Conservative]

I usually say that I will believe in Man Made, always make that distinction BTW, Global Warming when I see a Cave Drawing of a Woolly Mammoth driving a Chevy Suburban.