A Venn diagram was probably one of the first introductions you received to the mathematical field of logic. This particular type of diagram shows all possible logical relations between a finite collection of data sets.
The Venn diagrams you constructed in school were likely boring and inane. Nothing about the overlap between the characteristics of your classmates’ shoes, or characters in a piece of literature retained anyone’s interest.
I decided to fix the boring nature of Venn diagrams. This is a decisively good use of my college mathematics courses – the culmination of which was a mathematics minor.