Dave is furry. Dave is not white. Fiona is blue. Fiona is not cold. Fiona is furry. Fiona is red. Fiona is rough. Fiona is round. Fiona is not white. Harry is cold. Harry is red. Harry is rough. If Harry is white and Harry is red then Harry is rough. If someone is cold then they are round. All blue, cold people are white. If Fiona is not blue and Fiona is not red then Fiona is round. All furry, cold people are round. If Fiona is white then Fiona is cold. Blue people are furry. If Dave is not white then Dave is not cold.
Dave is rough.