I know we shouldn't try to guess who Satoshi is/was, but I always appreciated the Len Sassaman story. Reading now how Hal's symptoms worsened in early 2011, exactly when Satoshi retired...
Hal is not SN.
Hal received the first Bitcoin transaction from SN though.
By the way, Len Sassaman lives on in the blockchain:
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Why can't Hal be SN?
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There were many written interactions between the two.
They also were clearly different personalities. You can read the posts from both at Bitcointalk.
And the idea that SN was both just doesn't fit at all with how SN was.
SN mentioned for example that the license of the Bitcoin client should be the most permissive one because if it wasn't then other people would implement it with that license, therefore duplicating work.
SN usually was very efficient and didn't want to waste efforts in anything. Creating a whole different persona makes no sense.
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Not conclusive, but makes sense I guess.
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