Outsmarted by a 3 3/4 year old

So on Saturday night Oscar was kicking up a fuss and not listening at the dinner table, so I said to him "Oscar if you don't behave I will have to take your pets away." He say there thinking for a moment and then said to me "You can't do that, they aren't real." Which is completely true, he has about half a dozen imaginary pets and he had quickly worked out the fact that I could in no way take them away. He won that one.