propositional

Tutorial 5: Valid arguments, searching for a proof

Topic
derivations
propositional
Logical System
gentzen

Tutorial 5. Valid arguments, searching for a proof.

Under construction 2013

Skills to be acquired in this tutorial:

Proving an argument to be valid by displaying a derivation. Simple propositional derivations using some of the Rules of Inference.

The Tutorial:

If you suspect that an symbolized argument might be valid, you should attempt to give a derivation of it.

A derivation is a proof of validity.

Tutorial 4: Arguments and searching for a counter example

Topic
propositional
Logical System
gentzen

8/10/26

Skills to be acquired in this tutorial:

To learn how to symbolize arguments, and how to judge whether they might be invalid using truth-table methods.

Why this is useful:

We wish to appraise arguments, to do this we have to symbolize them first. Judging the invalidity of arguments by truth-table methods is not particularly important, but it does help to develop skills involving truth and lists of formulas.

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