Science 5

Five stars for its utility and value, but it isn't a religion.

The discipline of science requires proof and the testing of such proof, and the retesting of proof, and the reexamination of the testing methods in light of new data.

And in the expectation that the "Theory Argument" so beloved of creationists will come up, here follows the definition of Scientific Theory.

In science, a theory is a mathematical or logical explanation, or a testable model of the manner of interaction of a set of natural phenomena, capable of predicting future occurrences or observations of the same kind, and capable of being tested through experiment or otherwise verified through empirical observation. 

Note that there is a big difference from that and the definition of non-scientific theory, which is

An assumption based on limited information or knowledge; a conjecture

Here endeth the lesson.