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 retains any interest.

If you don’t want to, or can’t, go out, it’s only polite to offer up a reason. Between school, work, and half-baked brunch plans, we’ve all needed to, at one time or another, wriggle out of an obligation. Regardless of whether the cancellation is legitimate or flaky, it is sometimes…