To be honest, I wasn't smart enough to wrap my head around Schank's semantic graphs. However, was/am inspired by this: "best way to make a machine think is to first make it teach" [1]
That applies to humans too. Richard Feynman said that if you can't explain something to someone else you don't really understand it yourself.
"Feynman was a truly great teacher. He prided himself on being able to devise ways to explain even the most profound ideas to beginning students. Once, I said to him, “Dick, explain to me, so that I can understand it, why spin one-half particles obey Fermi-Dirac statistics.” Sizing up his audience perfectly, Feynman said, “I’ll prepare a freshman lecture on it.” But he came back a few days later to say, “I couldn’t do it. I couldn’t reduce it to the freshman level. That means we don’t really understand it.”
David Goodstein: http://calteches.library.caltech.edu/563/2/Goodstein.pdf