There is no "I" in "You"

[quip]

To you, apparently none. Carry on!

OK, what difference does it make to you?

It answers much. Anattā is an important concept to Buddhist understanding.

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Ontological identity had to come about at some point.    

-but, apparently, not before my conception, huh?

I dunno maybe.

The question is odd though sound.  Look, the premise is simple...just take an introspective look at your life. Have you ever wondered exactly why you are who you are; as a teenager did you wonder why you weren't the star football player or prom queen (assuming, like most of us, you weren't); why were you born into the family you were born into and the "what-if" fantasy of being somebody else. Well, why weren't you?

No, I wasn't a star football player because I didn't put the hours in.  I wasn't a prom queen because I have entirely too much penis.  Let me guess....though, you think the answer to all of these questions is " because magic"....huh.

No, magic seems the knee-jerk proxy for atheist's misinterpretation.

I'm simply expanding upon that nascent wonderment and making an ontological query into exactly how or why any one particular self among a historical amalgamation of selves has been, existentially speaking, personally discernible as "you". 

-and you've received plenty of sensible, easily demonstrable answers, despite your litany of insensible questions and responses.  What's the problem?  

No problem at all. If it's important to you that I have one....I'll see what I can do.

If nothing else comes of this, it aptly illustrates that the very hand-waving efforts at dismissing/dodging the inquiry exposes a blind spot within the atheist perspective.

Another inexplicable belief you have, to add to the pile, it would seem.

Perhaps you could expand your horizons with the aid of a couple of them.  Give it a try.