How to Argue With a Pre-School-Aged Child (And Lose) #32

P=Parent
C=Child

C: My sucker has a hair on it!
P: Go run some water over it.
C: Why?
P: To get the hair off.
C: That won't get the hair off.
P: Try it!
C: (washes the sucker) Look! It washed off the hair but it didn't wash off the lolly!