Keep thinking that way. I've had vegetables in my garden with more sense.
Your 'debatable position' was to put yourself in a parking lot going to the store, NOT armed following someone you thought was doing something suspicious.
Do you need an explanation of the difference? Flash cards? A map?
Look BP, When Zimmerman retreated he quit being the aggressor.
That is all there is to it. No different than if someone attacks you and you (well not you as guns scare you) pull your weapon and they run. You can no longer shoot them in self defense as they are no longer the aggressor.
If you had any friends and if one had a CHL they could explain it to your dumb liberal n00bie troll ass.
You do understand that you are looking stupider by the minute and for you to appear stupider than you already do is almost as hard as dividing by zero.