Make an unfalsifiable claim. I can safely predict that, due to construction of wind farms, the wind in Oklahoma will definitely blow slower, or faster. Not sure which one, but it will definitely be one of them. I can ‘safely’ say faster or slower, because no matter what happens, you can’t prove the theory wrong. No evidence will penetrate my warm, comforting certainty that this theory is correct. Slower? I predicted that. Faster? I predicted that, too. The same speed as yesterday? Well, that’s just a momentary and insignificant pause between faster and slower. This type of theory is not scientific at all, because it’s not testable. It’s ‘not even wrong‘. If it was false, no test could be devised to demonstrate its falsehood. Thus, passing a lot of tests says nothing about its scientific truth. The beauty of this is, since your theory can’t be proven wrong, your audience is not in a position to disagree. Why bother with scientific claims that can be questioned when you can be unquestionably right?