From the other perspective, how about teaching it?
Anyways, I have had a few students that could be considered 'older' than average, the oldest about 65 i believe.
It seems the older chaps SOMETIMES have more of a struggle with retaining knowledge, and remembering little things from flight to flight.
At other times, no worries!
It depends I guess on your own wants and abilities?
Cheers
Hagar.