answer:The ability to learn and the ability to articulate are two different things. Obviously vocabulary helps a person articulate. If you don’t know the best fit word for what you are trying to say, you obviously won’t be able to say it. The ability to convey what you have learned hinges on vocabulary, not necessarily good grammar, although that can’t hurt. I guess you could make the argument that the more articulate you are, the more likely you are to succeed since a lot of educational funding (and jobs) require you to write essays, make speeches, and interview successfully. The ability to learn has little to do with grammar, but being literate obviously helps. Even learning mathematics requires being able to understand an explanation. I’m guessing if you had no ability to speak a language and were trying to learn something, eventually you’d learn a language, too.