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Formal logic

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Displaying 1 - 10 of 10
Type Title Description Keywords Full details
Document Additional Note: 'If, then': The Material Conditional

An attempt further to clarify the problematic link between natural language conditionals and the material implication.

Formal logic view
Document Additional Note: 'Unless' and Precedence

A further explanation of how to formalise 'unless', and comments about precendence and the importance of brackets.

Formal logic view
Document Additional Note: Clarifying the Rules for Trees

Further explanation of the puzzle we noted in the sixth class.

Formal logic view
Document Additional Note: Destructive Dilemma

A direct comparison of the tree method and natural deduction. For thinking it through.

Formal logic view
Document Additional Note: Testing Validity: QL and Natural Deduction

A four-page sheet that tries to explain the ND-rules for the quantifiers as transparently as possible.

Formal logic view
Link Book: Logic Primer

A link to Paul Teller's website, where he offers for download his two-volume introduction to formal logic, which is out of print.

Formal logic view
Document Exercise 4, 6c (Additional Note 4)

On the question whether every formula in a natural deduction needs to be used.

Formal logic, Validity, natural deduction view
Document Exercises 1

Arguments, Soundness and Validity.

Formal logic view
Document Exercises 2

Translating into PL, wffs, quotation.

Formal logic, Proposition view
Document Exercises 3

Formalise sentences and calculate truth values in PL.

Formal logic, truth tables view
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