A wonderful story on this subject was written by Borges. The story "Funes
the Memorious" is very well known and has been referred to a number of
times by Oliver Sacks.
Check it out - but don't let it stop you from writing your story. Good luck.
R. Hyfler
relfyh at interport.netrelfyh at interport.net a/k/a arnelanti at aol.com