[ronelm2000]

Originally Posted by Craxuan

When the person himself says:

Spoiler for Kayaba:

That he's nothing more but a fragment of his dead self, that he's going to pass away and leave the rest to Kirito, I don't speculate that he's alive. It's just that I'm can't stand people making clear cut speculations with Kayaba alive as basis, when it's never confirmed, and hasn't shown up for at least five volumes.

There's no said evidence of Kayaba's body being dead. ever. (only words from a programmed AI he created...right?) Of course feel free to try and prove me wrong.