The statistics are already lacking in accuracy when it comes to guns preventing crimes. This is especially evident in cases where the gun was never fired by the defender.
That being said, I cannot argue against gun education. It's very important. Situational awareness is always a good thing to employ, and to that same effect, your post is mostly about circumstances and not about anything concrete.
I would run into this type of Q&A when I was instructing in the dojo. We would teach a technique and then it go off into a "Well, if you did this then I was just do this and".. rinse repeat.
The bottom line here is:
1. Know your tools
2. Don't PUT yourself into bad situations
3. Use your best judgement in resisting force.
#3 includes all aspects of assessment, and intelligently disarming the situation up to and including the use of deadly force.
I have been in enough confrontations to tell you more often than not, the person(s) attempting to accost you are not concerned with your wit. This is, of course, not inclusive of every situation, but my personal experience tells me to err on the side of making sure I get out alive no matter what.