Riddle: once there was two guys. mr.smith and mr.jones. they lived next door to eachother and they hated eachother because they always fought about their land and about this one woman who they bothed loved. on one cold night mr.smith was found murderd. they first suspected mr.jones. well mr.jones said i dont know anything because i was just walking home and i herd something from his house. he said that he wiped the frost and looked throw the window and there was mr.smith. they knew that he was lying. how?
Answer: because you have to wipe the window from the inside not outside and it was a cold night but not a winter night. so there cant be any frost.