** Module: Venn diagrams**

- V00. Introduction
- V01. Basic notation
- V02. Everything and nothing
- V03. Exercises
- V04. Three circles
- V05. Exercises
- V06. Existence 1
- V07. Existence 2
- V08. Syllogism
- V09. Exercises
- V10. Limitations of Venn diagrams

** Quote of the page**

Be careful that you write accurately rather than much.

- Erasmus

Help us promote

critical thinking!

** Popular pages**

- What is critical thinking?
- What is logic?
- Hardest logic puzzle ever
- Free miniguide
- What is an argument?
- Knights and knaves puzzles
- Logic puzzles
- What is a good argument?
- Improving critical thinking
- Analogical arguments

a. Is the statement "Every B is a C" true according to this diagram?

b. Is the statement "No A is a B" true according to this diagram?

c. Is the diagram consistent with the statement "Something is A"?

d. "Something is A and it is either B or C." Is this statement true according to this diagram?

e. Is the diagram consistent with the statement "Something is A or B"?