I guess mommy doesn't know everything.

The other day Megan was singing a song and I joined in. She said, "How do you know that song." I said, "I know everything." After a couple of minutes Megan asked me, "How many holes are on the moon?" Me, not even remembering our previous conversation said, "I don't know." To which Megan quickly replied, "I thought you said you knew everything?!"