Proof may pertain-to efficiency.Logical formLearned from19 sentences. A matter can be constituted-of-or-filled-with proof.Logical formLearned from19 sentences. A male may produce proof.Logical formLearned from19 sentences. Proofs can be constituted-of-or-filled-with security.Logical formLearned from19 sentences. Comments can be a proof.Logical formLearned from19 sentences. Persons may look for proof.Logical formLearned from19 sentences. A film can be a proof.Logical formLearned from19 sentences. A proof may be offered.Logical formLearned from19 sentences. A (scratch proof bottom) can be padded.Logical formLearned from19 sentences. Proofs may pertain-to printer.Logical formLearned from19 sentences. A proof may pertain-to a crime.Logical formLearned from19 sentences. Proofs can be complex.Logical formLearned from19 sentences. Proof may pertain-to a name.Logical formLearned from19 sentences. A world-city may want proof of a commitment.Logical formLearned from19 sentences. Proof may pertain-to identities.Logical formLearned from19 sentences.