Category Archives: Deductive Logic

The power of the non sequitur

From www.dilbert.com of course…

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Simpsons – post hoc ergo propter hoc

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Philosophy in Senior Schools

(From my appearance on ABC Radio National’s ‘Philosopher’s Zone) http://www.abc.net.au/rn/philosopherszone/stories/2007/1911312.htm Philosophy is about asking childlike questions – how do we know the world exists? How do we know it hasn’t just started existing? Why can’t we go back in time? … Continue reading

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Some important tools of critical thinking

(from my Ockham’s Razor appearance on the ABC’s Radio National) http://www.abc.net.au/rn/ockhamsrazor/stories/2010/2975629.htm  Robyn Williams: And now, the bad news. No, don’t run off – this is interesting – even Quite Interesting, as Stephen Fry might say. Here I’ll quote directly from a … Continue reading

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Logic in conversation

Why knowing deductive logic is not always an advantage..  Another Dilbert classic.

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More Dilbert magic – Argumentation

Deductive logic, argument, argumentation.

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The Tools of Critical Thinking

Ocham’s Razor episode with Peter Ellerton on Inductive and Deductive Reasoning and courses in schools. Critical thinking. Ockhams Razor – Ellerton (mp3)

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Just think: it’s important

Sydney Morning Herald article on teaching philosophy in schools. Reason being … Peter Ellerton teaches philosophy at Brisbane’s Calamvale Community College and started the Australian Philosophy Teachers Network to get more resources to teachers. Photo: Paul Harris     August 25, … Continue reading

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Exercises using truth tables or trees for validity worksheet

Worksheet with about a dozen problems requiring testing for validity using truth tables & truth trees, as well as some translating. Deductive Logic. Truth tree validity worksheet

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Basic Truth Table Posters

These simple posters were printed off and placed above the whiteboard for the duration of our propositional logic unit as a means of quick visual reference. Deductive Logic. Basic truth table posters

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Valid Arguments, Tautologies and Formal Fallacies (deductive logic)

A one page summary sheet of some of the main bits of propositional logic. Deductive Logic. Valid Arguments

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Truth Trees booklet

Booklet on the propositional logic technique of truth trees. Deductive Logic. Truth Trees

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Truth Tables booklet (deductive logic)

A booklet on the techniques of truth tables from propositional logic. Deductive Logic. Truth Tables booklet

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Propositional Logic – Translating and Symbolising (deductive logic)

An introduction to propositional logic – how to represent sentences and statements into propositions. Deductive Logic. Propositional Logic – Propositions booklet

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Natural Deduction booklet (deductive logic)

A booklet on the technique of natural deduction (requires knowledge of propositional logic) – deductive logic. Natural Deduction Booklet

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Categorical Logic booklet (deductive logic)

Traditional and categorical logic as Aristotle meant it to be… deductive logic. Traditional Categorical Logic

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Monty Python – ‘We found a witch!’ scene from The Holy Grail

Classic Python scene. Great for deductive logic, analogy, fallacies of reasoning. Mp4 format – good for ipods. About 4 minutes and 25 Mb. witch (mp4)

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Philosophy Games

The Philosophers’ magazine online – an excellent series of games on philosophy, critical thinking and deductive logic. Includes Battlefield God and moral philosophy games. http://www.philosophersnet.com/games/

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Penguin Logic

How not to do deductive logic (cartoon)

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