Improbable things that happen to us:

You walk through the dappled shade of the jungle, thankful for the break from the heat, when your nose picks up the soft wafting smell of something wheaty with a tinge of tomato-saucy goodness. From around a huge vining tree, and flying with great speed at your head, is The Flying Spaghetti Monster.

The great meatballs of doom squirt out sauce of deepest red and specks of garlic.

It spies you and says, in a booming voice that shakes birds from nearby trees, "HUMANS EVOLVED FROM PIRATES. CONSIDER THAT HUMANS SHARE AROUND 95% OF THEIR DNA WITH MONKEYS, AND MORE THAN 99.9% OF THEIR DNA WITH PIRATES. IT IS ELEMENTARY, MY CHILD."

You barely have time to grab your weapon, let alone come up with arguments against the claim.