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Single Idea 9538

[from 'Beginning Logic' by E.J. Lemmon, in 4. Formal Logic / B. Propositional Logic PL / 3. Truth Tables ]

Full Idea

A truth-table test is entirely mechanical, ..and in propositional logic we can even generate proofs mechanically for tautological sequences, ..but this mechanical approach breaks down with predicate calculus, and proof-discovery is an imaginative process.

Gist of Idea

A truth-table test is entirely mechanical, but this won't work for more complex logic

Source

E.J. Lemmon (Beginning Logic [1965], 2.5)

Book Reference

Lemmon,E.J.: 'Beginning Logic' [Nelson 1979], p.91