Dave is big. Dave is blue. Dave is furry. Dave is nice. Dave is quiet. Dave is round. Dave is smart. Fiona is big. Fiona is nice. Fiona is round. Harry is big. Harry is blue. Harry is furry. Harry is quiet. Harry is round. If Fiona is big and Fiona is round then Fiona is quiet. All round things are furry. If something is blue then it is round. If Harry is furry then Harry is smart. Nice things are quiet. Furry, big things are quiet.
Fiona is not blue.