An assertion can be flat.Logical formLearned from49 sentences. Places can be flat.Logical formLearned from49 sentences. A curve can be flat.Logical formLearned from49 sentences. A (track roller derby league) can be flat.Logical formLearned from49 sentences. A bowl can be flat.Logical formLearned from49 sentences. Courses can be flat.Logical formLearned from49 sentences. A container can be flat.Logical formLearned from49 sentences. Seats can be flat.Logical formLearned from49 sentences. A metal can be flat.Logical formLearned from49 sentences. Bonds can be flat.Logical formLearned from49 sentences. A world-city may finish flat.Logical formLearned from49 sentences. A person may go flat.Logical formLearned from49 sentences. Lowlands can be flat.Logical formLearned from48 sentences. A keyboard can be flat.Logical formLearned from48 sentences. An argument may fall flat.Logical formLearned from48 sentences.