Among the most extremist -and extremely ignorant- of the anti-science crowd you will come across statements such as this: "But evolution is only a theory." Indeed, but scratch the only. In science, the terms Hypothesis, Model, Theory and Law are indeed gradations in a scale but they certainly do not share their colloquial meaning or hierarchy. If you think a scientific theory ever becomes a law or a fact you may need to read the following. Let's go back to the basics.