We all will have to make exactly these types of decisions as the SHTF sooner than wished.
We all MUST make these decisions NOW.
REASONING: as I said before, the second you need to decide if, who, when, why, how many times, etc.etc.
IS THE SECOND they will use to shoot first.
Unfortunately, your decision will be grave no matter if it was right or wrong.
Your decision is and must be already made to fire as felt and needed---INSTINCTIVELY and AS TRAINED TO DO.
Unfortunately, also without thought, just instinctively. Your training is decisively FASTER than your thinking when you are only calculating the speed of reaction to a situation.
Example: if you touch a hot object, the reaction comes extremely fast--and the thought "ouch-hot" comes later.
If you train to fire quickly and accurately--it will come faster and the thought of survival will come afterwards.
WROL is the situation, unknown person is the target, his/her actions are the trigger and your shot is the reaction.
"this" is what will keep you alive and your family fed.
Every other thought, however nice and kind may very well get many innocents killed.
Sorry for the truth that makes you uncomfortable, but the LIES that make you comfortable are worse...