Investigators may have a proof.Logical formLearned from14 sentences. A proof may pertain-to a policy.Logical formLearned from13 sentences. Proof may pertain-to an achievement.Logical formLearned from13 sentences. Means can be constituted-of-or-filled-with proof.Logical formLearned from13 sentences. A course may pertain-to a proof.Logical formLearned from13 sentences. Proofs can be archaeological.Logical formLearned from13 sentences. A proof may pertain-to a date.Logical formLearned from13 sentences. Proofs can be for an existence.Logical formLearned from13 sentences. A proof can be for a theory.Logical formLearned from13 sentences. A proof can be straightforward.Logical formLearned from13 sentences. A proof can be terrible.Logical formLearned from13 sentences. A proof may pertain-to a character.Logical formLearned from13 sentences. Proof may pertain-to a time.Logical formLearned from13 sentences. A burden of proof can be on a student.Logical formLearned from13 sentences. A proof can be elaborate.Logical formLearned from13 sentences.