Magic or the internal logic of a four year old

This is a real conversation I had with Alice in bed when she was supposed to be asleep.

S "What is it?"

A "I need some milk"

S "It's on the table next to you"

A "There is none left."

S "If you've drunk it all then that's it. Time to sleep."

A "But I didn't drink it all.

S "If there is none left you must have. that's all. Go to sleep."

A "I didn't drink it though."

S "Well you must have if there is none left it was you."

A "It was magic."

She wins.