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5. Theory of Logic / E. Structures of Logic / 3. Constants in Logic

[terms, such as names, which have a fixed value]

2 ideas
Constants are absolutely definite and unambiguous [Russell]
     Full Idea: A constant is something absolutely definite, concerning which there is no ambiguity whatever.
     From: Bertrand Russell (The Principles of Mathematics [1903], §006)
In logic constants play the role of proper names [Bach]
     Full Idea: In standard first-order logic the role of proper names is played by individual constants.
     From: Kent Bach (What Does It Take to Refer? [2006], 22.2 L1)