"Real-world achievement" is considerably less clear as a way of pointing to what I am trying to point to than "physical cognition". It evokes all kinds of distracting side-issues about what constitutes the "real world". (Is pure mathematics "real-world achievement"? et cetera, et cetera).

For me, I don't see how "physical cognition" is better, because just what "physical" means here is as unclear to me as what "real-world" means in bogus's comment, and in rather similar ways. Is doing pure mathematics "physical cognition"? What about physics?

With no more context than your earlier comment where (so far as I know) you first used the term, I'd have taken "physical cognition" to mean something like "applying one's brain directly to the real world in ways involving planning and subtlety and the like", with playing a musical instrument being an example. But I now have the impression that you intend it more broadly than that, perhaps including e.g. musical composition (even if done in one's head). But exactly what you mean remains unclear to me, as does why (if I'm understanding you right) you consider "physical cognition" a more fruitful category of things to lump together than "real-world achievement".

(Note for the avoidance of doubt: I am not claiming that "physical cognition" is not a more fruitful category, nor that bogus's thinking in this area is better than yours, nor anything of that kind. I am just saying that it seems unreasonable to complain of someone "rounding off concepts" when you have made no apparent effort to clarify what you do mean, and that your specific objection to "real-world achievement" seems to apply equally to "physical cognition".)