One of Mr. Horton, his wife, their son, and Mr. Horton’s mother is a doctor and
another is a lawyer.
a) If the doctor is younger than the lawyer, then the doctor and the lawyer are not blood
relatives.
b) If the doctor is a woman, then the doctor and the lawyer are blood relatives.
c) If the lawyer is a man, then the doctor is a man. Whose occupation you know?
1. Mr. Horton: he is the doctor
2. Mr. Horton’s son: she is the lawyer
3. Mr. Horton: he is the doctor
4. Mr. Horton’s mother: she is the doctor