What if you were getting stupider?

I'm wondering if a service could be provided to let you know that you were getting dumber as your life trundled on. It would be useful, that's for sure, but it's probably not a commercially viable enterprise. As I read just the other day, there's a surplus of people who need their asses kicked, but few of them are likely to pay for it.

Flat out

It's interesting to have a really high fever, because it feels like a window into a time when I'm lobotomised. I've been sluggish, listless, incapable of attempting large scale endeavour. I haven't even been able to play games on the Xbox.