Sort of a complicated question, I'll try to ask. How was I born me and not another?

[EruptedCarcassBloat]

Okay, it just came to me that I could ask the question a little bit simpler.

What are the chances of me actually being born?

Do you mean, out of all of the possible combinations of your parents' genes, what is the chance of getting any specific set?  Otherwise it's 100%, since you're here to ask that question.

And..that's not really a simpler question.  There's a lot of philosophical baggage tied up in that short sentence.

No, I mean what is the possibility of just never being born, never becoming a part of the human genome to be born in the first place. It's so strange to me that I ended up here, on this planet, as a human being. I consider it especially luck that I was born as a human being who has sentience. Maybe that wouldn't be so lucky for some.... but it's still fascinating. 

Okay, it just came to me that I could ask the question a little bit simpler.

What are the chances of me actually being born?

Obviously, 100%, unity...here you are.  Recall one of the first things I said, in response to your question?  

...just flirtation with an inapplicable fascination towards the improbability of outcomes.  

You're making an error in that last post of yours. It's not a question of what is the probability of being born a rock. Jesus Christ, you should second guess before you make such a wild assumption. No, what I meant was what are the chances of never being born, and instead just being a rock instead of a baby, or some sediments in the soil. Whatever. Doesn't have to just be a rock.