“It’s only a theory”
When you think about it this is actually more of an argument for evolution. Most people counter this ridiculous logic by saying “Well so is gravity you n00b”. I think a much better approach would be “Yes, it is a theory, and do you know what a theory really is? The brilliant part about a theory under the positivist scientific method is that it can’t actually be proven, it can only ever be disproven. Evolution being a theory is really a testament to the fact that it has not be disproven despite rigorous scientific scrutiny”.