You create, test and reject or accept theories constantly. You are attempting to explain some phenomena, in this case, why you were just shot down. 3 - You are a total loser and no sane person would even be seen with you, much less date you. Each of the above explanations has its own theory base - it might be psychological, sociological or both. If the theory holds true, and you can't get a date, you might somewhat safely infer you are indeed, alas, a loser.
Theories are just that.
Some theories have lasted so long without being proved wrong that they are now called laws. There are not lots, but gravity would be one of them. It is conceivable that we will all suddenly float off, but it hasn't happened yet. The thing to remember, is that theories that cannot be tested might not be very good theories. On the other hand, that's just a theory.