What I've been talking about, specifically, is cognitive abilities and your seemingly extraordinary claim (extraordinary because you insist it necessarily appli

What I've been talking about, specifically, is cognitive abilities and your seemingly extraordinary claim (extraordinary because you insist it necessarily applies to every member of the species). You now seem to have veered off into some kind of far more general discussion of "decline" (aging), which I was not addressing, as the original commenter (and, arguably, TFA) was referring, specifically to "knowledge workers". If "talking past each other" means that I've been trying to keep my commentary specific to so-called knowledge working productivity and cognitive abilities, while you keep trying to expand the conversation to overall aging, then, yes, that's what's been happening.