more from Rod Girle

### Single Idea 7790

#### [catalogued under 5. Theory of Logic / H. Proof Systems / 5. Tableau Proof]

Full Idea

The truth trees method for establishing the validity of arguments and formulas is easy to use, and has the advantage that if an argument or formula is not valid, then a counter-example can be retrieved from the tree.

Gist of Idea

If an argument is invalid, a truth tree will indicate a counter-example

Source

Rod Girle (Modal Logics and Philosophy [2000], 1.4)

Book Reference

Girle,Rod: 'Modal Logics and Philosophy' [Acumen 2000], p.8

Related Idea

Idea 13613
A completed open branch gives an interpretation which verifies those formulae **[Bostock]**