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Formal logic requires, since Frege, a distinction between the object language and the metalanguage. The metalanguage is ordinarily a natural language like English or German, while the object language is a symbolic language with an alphabet limited to variable meanings and a symbolic system for describing the relationships between the variables.
Formal logic requires, since Frege, a distinction between the object language and the metalanguage. The metalanguage is ordinarily a natural language like English or German, while the object language is a symbolic language with an alphabet limited to variable meanings and a symbolic system for describing the relationships between the variables.
== Logical reasoning ==
''See also:'' [[Logical reasoning]]
== Informal Logic ==
== Informal Logic ==