A lattice can be abstract.Logical formLearned from4 sentences. Precepts can be abstract.Logical formLearned from4 sentences. Goals can be abstract.Logical formLearned from4 sentences. Woodcuts can be abstract.Logical formLearned from4 sentences. (Security policies) can be abstract.Logical formLearned from4 sentences. An inference can be abstract.Logical formLearned from4 sentences. A contribution can be abstract.Logical formLearned from4 sentences. A set can be constituted-of-or-filled-with abstract interfaces.Logical formLearned from4 sentences. Atoms can be abstract.Logical formLearned from4 sentences. A suffix can be abstract.Logical formLearned from4 sentences. A linear algebra can be abstract.Logical formLearned from4 sentences. Etchings can be abstract.Logical formLearned from4 sentences. Abstract artists may undergo a generation.Logical formLearned from4 sentences. Abstract expressionism may undergo an abstraction.Logical formLearned from4 sentences. Abstract expressionism may undergo an evolution.Logical formLearned from4 sentences.