The Many Worlds of Logic

An Online Resource for Logic Teachers and Students of Logic

Slides

Fundamental Concepts of Logic

For more information on these topics, see chapters 1-6 in Introduction to Logic

Introduction to Logic

A concise introduction to the discipline and some resources for further study.

What is an Argument?

One of the fundamentals of logic and an important starting point.

Supplement - The Argument Clinic

Deductive and Inductive Arguments

Arguments of necessity and impossibility, and probability.

Deductive and Deductively Valid Distinguished

The conclusion must follow from the premises in the right way.

What is Validity?

Hint: It's about the structure not truth value.

More on Validity

Digging deeper on the concept of validity.

Inductive Strength

The stronger the argument, the more probable is the conclusion.

Relations

How statements in logic relate to each other and how truth plays a role.

Overview of the Fundamentals of Logic

An overview of key concepts in the Fundamentals of Logic

Categorical Logic

For more information on these topics, see chapters 7-9 in Introduction to Logic

Elements of a Categorical Sentence

An introduction to categorical logic -- the logical system of the Ancient Greeks.

Elements of a Categorical Syllogism

Categorical logic applied to arguments.

Venn: Testing an Immediate Inference

Using a Venn Diagram to test whether a conclusion follows from just one premise.

Venn: Testing a Syllogism

Using a Venn Diagram to determine whether a syllogism is valid.

Truth-Functional Logic

For more information on these topics, see chapters 10-22 in  Introduction to Logic

Predicate Logic

For more information on these topics, see chapters 23-28 in Introduction to Logic

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