Take the following as truth: At 4 o'clock, Mrs. Inglethorp quarrels with her son, and threatens to denounce him to his wife ”who, by the way, overheard the greater part of the conversation. 
Then the following statement: "At 4 o'clock, Mrs. Inglethorp listens to her son play the piano for her." is true, false, or inconclusive?
Answer: False