X can be "breathing sufficient to survive"
People do die as the result of poor breathing so "sufficient" isn't that clear either.
"chess played poorly"
That's no description of an ability. We don't take about whether Alice or Bob are better at "chess played poorly". When we talk about abilities we generally do take about things that aren't binary.
People do die as the result of poor breathing so "sufficient" isn't that clear either.
I've never heard of anyone dying as a result of poor breathing related to lack of skill in breathing.
I think you're trying to fight the hypothetical. Do you seriously think there is no X such that I can say that X doesn't require any skill?
(Continuing the posting of select posts from Slate Star Codex for comment here, as discussed in this thread, and as Scott gave me - and anyone else - permission to do with some exceptions.)
Scott Alexander recently posted about growth mindset, with a clarificatory followup post here. He discussed some possible weaknesses of its advocates - as well as their strength. Here's a quote outlining the positions discussed: