What does 'I' stand for?

No, I am not going to answer that question in this post.

The book I am a strange loop is a search for the answer. I just read 50 pages of it and came up with this thought...

In that book 'being alive' is described as having a set of complex reflexes. Then one of those relexes (one of the strongest) should be a reflex that generates the answer 'I am alive' whenever I ask myself 'Am I alive?'.

"I think, therefore I am"