Ok but maybe your father or mother would've had a baby with someone else, and then you'd be that person.

I'm not even the same person as who i was yesterday.

Everytime my stream of consciousness stops and starts I am a new person built from the thousands of lives that came before.

This is not a saddening fact but an enlightening one. We all stand on the shoulders of those that came before us.

I thought we stood on their heads...

You are your 'current' feelings and your past memories. The reason for the downvotes is that from your logic mabbo is every person who has ever existed in the history of the human species. Since every person has their own current feelings and past memories, saying mabbo would have been that person instead is a little meaningless.