A little girl raised her hand.Little Girl: May I ask Tommy a few questions?Teacher: Go ahead.Little Girl: Tommy, do you see the tree outside?Tommy: Yes.Little Girl: Do you see the grass?Tommy: Yes.Little Girl: Did you see the sky?Tommy: Yes.Little Girl: Do you see the teacher?Tommy: Yes.Little Girl: Do you see her brain?Tommy: No.Little Girl: Then, according to what we learned...