"06164665-n"^^ . "formal logic"@en-us . . . "any logical system that abstracts the form of statements away from their content in order to establish abstract criteria of consistency and validity"@en-us . "symbolic logic"@en-us . . "106164665"^^ . . . "symbolic logic"^^ . . "104681560"@en-us . . "0"^^ . . . . "mathematical logic"@en-us . . . . "105794114"@en-us . "0"^^ .