There is no such thing as an 18 year old child. Either let them decide for themselves because they're an adult, or kick them out so they live on their own and

There is no such thing as an 18 year old child. Either let them decide for themselves because they're an adult, or kick them out so they live on their own and decide for themselves because they're an adult, but in either case, they decide for themselves because they're an adult. Hint: they decide for themselves, because they're an adult.