My action is to punch you in the nose. If my result is at least a zero then I have succeeded in my action (i.e. punched you in the nose) inflicting 0 or more stress.
I don't see a lot of room for debate here.
Richard
My turn comes up. My character raises his rocket propelled grenade launcher, aims at your character's face, and fires. My roll nets 0 shifts, 'hitting', but only barely. Your character, a pure mortal, is as-yet uninjured (no consequences filled), and has 4 stress boxes, also as-yet unmarked. The attack deals somewhere between 4 and 6 stress (battlefield weaponry being 4
+).
By your logic, your character should die. After all, they just took an RPG to the face.
Game mechanics, however, would seem to disagree, given that, at most, your character would be forced to take only a mild consequence, and possibly not even that.
But then, I think the problem comes in a fundamental misinterpretation of your third quote: '[...]describe what your character is doing in terms of one of the basic conflict actions. The basic conflict actions are:[...]'
You're describing what your character is doing as 'punching the target in the face', when you should be describing what your character is doing as merely 'attack' (plus whatever parameters are necessary to determine the rolls involved, ie. you're using fists, you're supernaturally strong) until after you know the results of the roll because:
the defending player chooses their consequences so long as they pass a reasonableness test adjudicated by the table