Logical Fallacies - Appeal to Possibility

I had a friend that encouraged me to read the Foundation series.  I started to read it, but I never picked up the second book because it seemed so logically inconsistent.  It was all the probabilities quoted that bothered me.  The author seemed to believe that the most likely events were events that would happen, at least most of the time.  It's a huge fallacy.  In real life, unlikely events far outnumber likely events, so much that in most cases the more likely events still are not very likely.

The appeal to possibility (sometimes called the appeal to probability) is the argument that since something is a viable possibility (or has a high probability of happening) that we may accept it as a forgone conclusion.  I see this reasoning when people don't believe that I truly love my wife, simply because I'm gay.  They see valid cases of gay men married to women who are not happy in those marriages, and so assume that since the possibility is there, it must be true for me.  Nothing could be further from the truth.  But it makes for a great example of the logical fallacy.