I understand it fine. I also understand that identifying fallacies is not the be-all and end-all of rational thinking, which is the thing you don't seem to grasp.
Actually, you don't. You don't understand the implications of evolution being based on the fallacy of affirming the consequent and others.
The implication is that evolution is a belief, not science.
This you either do not understand or simply refuse to admit because it would demolish the foundation of your belief.