Board Thread:New on Metal Gear Wiki/@comment-4016602-20130619000523/@comment-4913740-20130619032325

This theory has been developed already. Some people have claimed Ishmael is Solid Snake but obviously the age doesn't fit there since the accelerated aging doesn't kick in until later on. However, Eli being Liquid is a pretty solid theory in my opinion, one that I agree with.

http://metalgear.wikia.com/wiki/Thread:32233