I think creationists have the wrong idea of what a "theory" is.. I hear a lot of creationists' arguments that bash evolution, Darwinism, and the Big Bang simply because they are "theories." Let's break down the definition.. A "Theory" is a tested group of observations and propositions that correlate with one another to serve as the best known explanation or prediction for a phenomena based on the evidence at hand. Theories are constantly being subjected to testing and other alternatives in order to better our understanding of that phenomena. If you happen to reject these tested scientific observations because they're "theories," then what's stopping you from rejecting other theories such as the law of gravity, or the fact that our planet orbits the sun?