There is no "I" in "You"

[quip]

By what method(s) do you presume to know or question A's self-identity?

A's non-existence at the point of C's existence would be a start...

Bodily speaking perhaps though not mentally so. You're just reissuing the very conundrum of self.

Moreover, A can choose self-identify as B even without that merger, relying solely on one's self-identity is a bit pointless.

Sure, in either case though A doesn't have B's personality/memories/experience to draw upon. Would A not be an impostor?

But looking at it from another perspective, if we are to take A's view of self-identity as truth then it'd mean just the experiences or memories make an individual, but in that case none of A or B's relatives or friends would have memories or experiences of this ((A+B)/2) person and for them it'd be a person similar or quite like the person they knew but not that exact same individual.

---

The first cogent thing you've uttered! 

It's a start......

Hardly.  I don't agree with Rhythm about everything, and when we do disagree it's a voluble one, but I would never make the mistake of dismissing the man --- he's a solid thinker whether or not we find agreement.

I think there's something in there you might want to chew upon; the ability to absorb contraventional thinking is a valuable asset to a thinker. Not that I'm an expert in that field.  

You're correct to a point. Given his adolescent avatar and disposition it seems he's an angry young man who chooses to employ his intellect by defensively lashing out hostile invectives, all for efforts (presumably) to save the world from the devilry of religion.  

Waste of talent if you ask me. But hey, maybe someday we may meet half-way.