Scientists may have proof.Logical formLearned from32 sentences. Proof may pertain-to qualifications.Logical formLearned from32 sentences. Proof may pertain-to authority.Logical formLearned from32 sentences. A proof can be presumptive.Logical formLearned from32 sentences. Some form can be constituted-of-or-filled-with proof.Logical formLearned from32 sentences. Proof may pertain-to a date.Logical formLearned from32 sentences. A person may show a person proof.Logical formLearned from32 sentences. Details may pertain-to a proof.Logical formLearned from32 sentences. A person may demand proof.Logical formLearned from32 sentences. An existence can be a proof.Logical formLearned from32 sentences. A person may offer proof.Logical formLearned from32 sentences. Investigators may have proof.Logical formLearned from32 sentences. Proofs can be strong.Logical formLearned from32 sentences. Proof can be impossible.Logical formLearned from32 sentences. A game can be a proof.Logical formLearned from32 sentences.