I would have expected the real Satoshi to sign a message from his known address making it certain it's him.
The username checks out, has an OTC rating, and has been on bitcointalk since 2011. Completely trustworthy, lets see what they say.
a. lost/destroyed the key
b. purposefully keeping it uncertain
I would have expected the real Satoshi to sign a message from his known address making it certain it's him.