I'll take every advantage, pick the best opportunity, to kill any bear that charges/confronts me. Every charge is real, until the bear's butt is the only thing I can see. Should the shooting begin, it continues until the bear is stone cold dead, no longer visible, or out of range.
More specifically, I'm not gonna give any bear a free pass to bluff charge within ~30yds, if carrying a bear capable rifle or shotgun. If carrying only a revolver, any hostilities displayed closer than ~15-20yds, gonna cut loose and give it my best shots.
Will not be concerning myself with what F&G might decide after the fact. If just one bullet enters the frontal profile of the bear, I'll be justified in my own mind. No man has to know the true mindset of a bear in order to take defensive action, IMO.