John Venn (1834 - 1923)
British mathematician and philosopher, who specialized in mathematical logic
the Venn diagram, used in the fields of set theory,
probability, logic, statistics, and computer science.
1. Draw a Venn diagram with 3 circles. Label each circle with one of your names.
2. Fill in the overlaps in with items that those people sharing the area have in common.
Fill in an area that a person does not overlap by listing an item that the person does not share.
So you'll have 7 items total.