Charlie is smart. Erin is young. Fiona is smart. Harry is blue. If something is rough and not quiet then it is blue. If something is quiet then it is young. If Fiona is blue then Fiona is not rough. If Erin is big and Erin is blue then Erin is smart. All quiet things are round. If Charlie is not round then Charlie is smart. If something is quiet and not round then it is smart. If something is not blue then it is smart.
Charlie is not smart.