Pictures and diagrams can be very useful in presenting information or assisting reasoning. In this module we shall focus on Venn diagram. They are used to represent classes of objects. We can also use them to evaluate the validity of certain types of arguments.
Venn diagrams are named after the British logician John Venn (1834-1923), a fellow of Gonville and Caius college at Cambridge University. He was also a philosopher and mathematician, a pioneer of logic and probability theory.
In 1989, Gonville and Caius college installed the stained glass window on the right to commemorate his achievements.
To learn how to use Venn diagrams, you need to understand the basic notations. Please go through these tutorials in the order listed.
I carry my thoughts about with me for a long time, often for a very long time, before writing them down.

Ludwig van Beethoven