Early signs:

--Big time frustration with tech...new computer printer and either the instructions are designed for a prescient alien or I'm just not following...in four languages, and a You Tube video. Other stuff like that as well;

--Forgetting fun facts to know and tell...like my ladyfriend's address;

--Over reliance on the GPS to go places I've been a dozen times before;

--Names;

--And, spelling...although I never was a good speller. Nice trait for a guy who made his living writing.