Bob is big. Bob is not blue. Bob is smart. If someone is rough and furry then they are big. If someone is blue then they are not big. If Bob is quiet and Bob is blue then Bob is not white. All quiet, white people are furry. Blue people are not furry. If someone is big and blue then they are not rough. Smart people are white. If someone is big and not white then they are furry.
Bob is not smart.