Reasonable people need to know what science is about, especially what an established scientific theory is and how scientists know when it's right...

Science is based entirely on experiment. To illustrate what that means, I raise the possibility that the world was created three hours ago with all our memories and everything else in place, and I encourage discussion of that possibility. Science cannot refute it. That leads into the notion that a proposition is not a scientific theory at all unless it's falsifiable in principle...

I always discuss the words "It's only a theory" by saying that for practical purposes that's the same as saying "It's only science," and the price we can pay for such contempt for science is high.