In "Choctaw Bigfoot," what is the moral of the story?

The children ask Uncle Kenneth how he knows so much about the Choctaw. The narrator is sure he knows, and blurts out that his own mother must have read about the Choctaws to Kenneth when he was a kid. Uncle Kenneth, however, has another answer: "Or maybe I learned to read before I learned to tie my own shoelaces" (121).