Charlie is blue. Charlie is smart. Dave is smart. Dave is white. Fiona is red. Fiona is rough. Fiona is white. Fiona is young. Harry is blue. Harry is red. Harry is rough. Harry is smart. Furry, smart things are red. If something is red and young then it is smart. If something is white then it is rough. If something is young and smart then it is furry. If something is smart then it is white. All smart, rough things are young.
Dave is furry.