That you don't understand this fact is yet another indication that you do not understand the issues in this thread.
I think I understand the issues fairly well. And I can tell you that when presented with a fallacy, people recognize it.
What happens is that people don't THINK in real world situations. Take my example of the "great artist":
All great artists have a lot of women.
I have a lot of women.
Therefore, I am a great artist.
If my friend had been able to realize that this was the idea he was living by, he would have recognized immediately the fallacy involved.
In fact, he did recognize it eventually.