Alice

It wasn't until 30 odd years later that he finally discovered his true birth condition:

Before the deterministic formation of the flesh and bones, and before his little tail fell off to make room for the rest, he was momentarily set free to start afresh. Crawling out into the three-dimensional world, the knowledge became dormant, overpowered by innumerable suggestions.

All it takes to recall is to not think what it is. The world has few more surprises.