I have always been scatter brained and absent minded.
Back when I was a professor I could easily pass for being absent minded. I could never remember student names, etc.
As I've gotten older and since my stroke this has gotten worse. I'll make a list of what I need to do for that date and I'll forget either where I put the list or to even consult the list I already made.
So I know people have shot me kosmail or mail to my email accounts and I have not responded to them. I'll read the mail, tell myself I'll respond later and lose track of everything.
So if you have sent me an email and I have not replied yet I am sorry. Please know I'll do my best to do so ASAP.