______ asks: “Is Mr. Heathcliff a man? If so, is he mad? And if not, is he a devil?”

The quote you provided is from Emily Bronte's novel "Wuthering Heights". The character who asks this question is Isabella Linton.

1. "Is Mr. Heathcliff a man?" - Yes, Mr. Heathcliff is a man in the literal sense. He is one of the main characters in the novel.

2. "If so, is he mad?" - This is subjective and depends on one's interpretation of the character. Heathcliff is portrayed as a complex character with a range of emotions, which at times can be extreme. Some readers might interpret his actions and behavior as madness.

3. "And if not, is he a devil?" - Again, this is subjective. Heathcliff is often cruel and manipulative, which could lead some to describe him as devilish. However, he is not a literal devil. He is a human character with both good and bad traits.