"See? There's the proof you wanted! The newspapers confirm that Al Pacino does exist! Do you still doubt that he comes over to my place every Saturday to play cards?"
"See? Scientists admit that there might be life on other planets! Do you still doubt that Egyptian pyramids and crop circles are the work of alien visitors?"
"Many believe all atheists are jerks who don't respect other people's beliefs. This is not just unsopported opinion. It can be proven! Suppose there exists at least one atheist who respects other people's beliefs. Well, this atheist is disrespecting the belief that atheists don't respect other people's beliefs. Quod erat demonstrandum.
"Proof that men and women are equal. Major magazines targeted at both demographics feature seductive women on the cover and content oriented to man's sexual gratification. I rest my case."