A proof can be substantive.Logical formLearned from63 sentences. A country may demand proof.Logical formLearned from63 sentences. Someone may need proof.Logical formLearned from62 sentences. A proof can be just.Logical formLearned from62 sentences. Proof may be found.Logical formLearned from62 sentences. A proof can be alleged.Logical formLearned from61 sentences. A proof may exist that something-is-the-case.Logical formLearned from61 sentences. A country can be a proof.Logical formLearned from61 sentences. An incident can be a proof.Logical formLearned from61 sentences. A proof may pertain-to a country.Logical formLearned from60 sentences. A proof can be algebraic.Logical formLearned from59 sentences. Proofs may pertain-to an existence.Logical formLearned from59 sentences. A proof may pertain-to a philosopher.Logical formLearned from58 sentences. A proof may pertain-to claims.Logical formLearned from58 sentences. Proofs can be interactive.Logical formLearned from57 sentences.