Logic

Amelie is not Terence Tao, but today she demonstrated her first logical deduction. Well, not quite but...

Dad: Amelie, take your hat from your mouth, it's dirty.
Amelie: Doggy pee in the hat (giggles).
Dad: What?
Amelie: Doggy pee in the hat (giggles).
Dad: Huh??
Mom explains: Earlier, during our walk with Sofia, Amelie wanted to touch the fire hydrant, to which she was told, "don't do that, it's dirty, dogs pee on fire hydrants..."

By the way, is this modus ponens or modus tollens??