What is Logic About?

Logic is the study of good and bad Reasoning.

What is Logic About?

Al is taller than Bill.

Bill is taller than Carol. GOOD

So Al is taller than Carol.

Logic is the study of good and bad Reasoning.

What is Logic About?

Logic is the study of good and bad Reasoning.

Al is taller than Bill.

Bill is taller than Carol. BAD

So Carol is taller than Al.

What is Logic About?

Logic is the study of good and bad Reasoning.

This course will teach you mathematicalmethods for distinguishinggood from bad reasoning.

Al is taller than Bill.

Bill is taller than Carol. BAD

So Carol is taller than Al.

What is Logic About?

We need some technical vocabulary…

What is Logic About?

We need some technical vocabulary…

Argument: A “chunk” of reasoning.

What is Logic About?

We need some technical vocabulary…

Argument: A “chunk” of reasoning.

Valid: The reasoning is GOOD.

Arguments

All UH students are communists.

All communists like broccoli.

All UH students like broccoli.

Argument

Arguments are “chunks”of reasoning.

Arguments

All UH students are communists.

All communists like broccoli.

All UH students like broccoli.

Argument

Arguments are “chunks”of reasoning.

Statement

Statement

Statement

Arguments

All UH students are communists.

All communists like broccoli.

All UH students like broccoli.

Argument

Arguments are “chunks”of reasoning.

Premises

Arguments

All UH students are communists.

All communists like broccoli.

All UH students like broccoli.

Argument

Arguments are “chunks”of reasoning.

Conclusion

Premises

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