Poll: Can a learning curve go down?

Marianne

If I am right in my assumption that a learning curve will have knowledge gained on the y axis and time or experience on the x axis, then surely the answer must be no. You may plateau, at some point, when experience doesn't teach you anything new, but surely you can't "un-learn" what you already learned.

anony

You can forget something you've learned, when you don't use that knowledge for a long time.