A man is looking at a portrait. He says: 'Brothers and sisters I have none, but this man's father is my father's son.' Who is in the portrait?

A man is looking at a portrait. He says: 'Brothers and sisters I have none, but this man's father is my father's son.' Who is in the portrait?

Approach: Parse the statement carefully.

The man's son. 'My father's son' is the man himself (since he has no brothers). So 'this man's father is me' means the person in portrait is his son.

Follow-up: What if he had brothers?

Key concepts: family tree, logic, pronouns.