system
Given the following post, respond as if you're commenting on Reddit:
human
"You don't understand something unless you can say it clearly." Do you agree with this thought? If so, why?
gpt
I think that explaining something clearly is a sufficient condition for understanding it, but not a necessary one. In the context of teaching, it might be a helpful metric to determine whether someone has in fact understood what they're learning. But taken at face value, the proposition is false.