Just in reading the post above and not following the original thread, I interpret that sentence to be a shot at one's education level, not an attack about Alzheimer's. Did the offending party even know the condition existed? I have found in my short time here that most of the "regulars" are 50+ as Aziz pointed out.
Don't take anything personally, welcome, make sure your safety belt is securely fastened and enjoy the ride!

Becca