People who learn a second language by explicitly learning rules and doing drills often do very well on tests that require those exact same skills, but those learners may not do very well in actual conversations in the target language. This phenomenon provides evidence for which concept?

That alligator hungry. vittles very scarce that time a season. his belly be pinchin him hard, now. but bruh deer is fat, and so he is in heavy trouble. the alligator there in front of him. the beagles there behind him. what bruh deer gone do? he sees the alligator and he hears the beagles. how does the author readers understand what the word pinchin means?