We don't know.  We don't need to.

I have a business card which I like to think might be Satoshi's.  It reads, "This card intentionally left blank."  I could upload a picture of it if you're interested.

FWIW, speaking as someone whose name is on your list of candidates, I regard this fixation on Satoshi's identity as being a little dangerous.  There are people who might do awful things to other people if they think that by doing so they might get their hands on Satoshi's coins.  Many of them read this forum.