Why People "Fly from Facts"

“There was a scientific study that showed vaccines cause autism.”

“Actually, the researcher in that study lost his medical license, and overwhelming research since then has shown no link between vaccines and autism.”

“Well, regardless, it’s still my personal right as a parent to make decisions for my child.”

Does that exchange sound familiar: a debate that starts with testable factual statements, but then, when the truth becomes inconvenie