Look ... first and foremost, I'm a scientist. That means it's my responsibility to make observations and gather evidence before forming a hypothesis, not vice versa. — Allen Steele Copy Share Image
“I am using the word theory as a scientist means it: a set of ideas so well established by observations and physical models that it is essentially indistinguishable from fact. That is different from the colloquial use that means "guess."… — Philip C. Plait Copy Share Image