What do you do when your 6 yr old outsmarts you?

Recently Zachary has really been able to express his point of view through very logical arguments. He is never disrespectful or rude, he just matter of factly tells his point of view. As an example, I was just finished with the leaf blowing job under our maple trees and getting ready to mow the lawn when he climbed up the tree and started to shake off the leaves. To the point of practically picking them off the branches. I asked him not to because I just finished getting it ready for being mowed. He said to me "well mom they are all going to fall off anyway." What do you say to that? I said you are right Zach, they will, have fun buddy.