Q. A promised to help B with a sum of money should B move out of T; or, A promised the money to B should he buy a certain article. After B moved out of T, or bought the article, A changed his mind. A. If the article is worth the money B paid for it, A is free from obligation; otherwise A must compensate B for his loss. Similarly, in the former case, if B had intended to leave T in any event, A may now claim that he was joking when he made his promise. SOURCES: Cr. 203; Sinai VII (1943), 5–6, 51.