[voice]
I hadn't asked about your own choices, either, but you chose to give them. And beyond yourself, it is a general question about anyone.
I asked whether someone could be incapable under any circumstances. If you have never once been in a situation where this choice has come up, can you be so sure of your claims?
If you had a friend threaten the life of another and the only choice to save one friend was to kill the other, would you stand by and watch instead?