Think carefully at trick one

Robert J. Sawyer, a Canadian science fiction writer, said, "General principles should not be based on exceptional cases."

This week we are studying third hand's finessing against his partner at trick one. The general principle is that when dummy has one honor, third hand holds a higher honor, and dummy plays low, third hand saves his honor when he can insert a nine or higher.

However, bridge still exists because of exceptional cases. Is this deal one of them?