An assistant may knock on a door.Logical formLearned from3 sentences. (Speed bumps) may knock a person off course.Logical formLearned from3 sentences. Someone may knock a marble.Logical formLearned from3 sentences. A head may knock into a (tile wall) of a pool.Logical formLearned from3 sentences. A solstice may knock.Logical formLearned from3 sentences. Somebody may knock a person.Logical formLearned from3 sentences. A fall may knock some sense.Logical formLearned from3 sentences. A male may knock a shoulder.Logical formLearned from3 sentences. A person may knock an elbow.Logical formLearned from3 sentences. A male may knock on a room.Logical formLearned from3 sentences. Noughts may be knocked off an end of (currency notes).Logical formLearned from3 sentences. An arrow may knock.Logical formLearned from3 sentences. A central-bank governor may knock some zeroes off a currency.Logical formLearned from3 sentences. A female may knock over a vase.Logical formLearned from3 sentences. A month may knock at a door.Logical formLearned from3 sentences.