For my question, it doesn't matter. The law will have a definition (probably through case law) of what constitutes "consent". I don't get to define that. That's why I said, "Dunno." I'm guessing by your stalling that you don't, either, and that you really didn't know what you were talking about in the post that started this nonsense. I think this has run its course.
i see youve changed the word under consideration ( again) consent andagreement are not interchangeable words, but the legal definition of consent is pretty much established in most countries as being " informed" consent, that is you clearly know what you are consenting to and that's its consent with free will and that you can with drW that consent at any time.
if someones says, letsstep outside and settle this argument man to man, its far from clear you have consented to a fight,
if they say come outside and I'm punch your lights out, you clearly haven't given them consent to knock you out, it's not clear at all if you have given them consent to try and knock you out, all you've done it go outside, there's no agreement to fight.
if they are very very clear about their intent and you verbally agree to fight them and go outside, then you can say after the first punch, I with draw my consent, then if it carries on, you are now defending them self's against an attack for which there is no consent.
just as in an actual fight by consent in a licienced boxing ring, either party can quit when ever they want, if the other party continues there is no consent and what they are doing is assault, for which self defence is available to you