Lavinda Past
Well-Known Member
Yes. Prodigious memory feats are often a sign.
Have a look on Google about Stephen Wiltshire MBE, Hon. FSAI, Hon. FSSAA (born 24 April 1974), a British architectural artist and autistic savant.
He is known for his ability to draw a landscape from memory after seeing it just once.
Look up his drawing of the Houses of Parliament from memory. Absolutely wonderful stuff.