[haritha-j]

For usable diagrams, beyond 3 sets, I always recommend upset plots, I wrote a little piece on them rather recently: https://medium.com/@harithajayasinghe/beyond-venn-diagrams-d...

[leontrolski]

Ditto, another Upset blog post - https://leontrolski.github.io/upset.html

[turnsout]

TIL about upset plots. Really cool! Venn is already unwieldy at three sets, but four is not really doing the job of communicating the set inclusion clearly. Seven is just a geometric curiosity.

[Jaxan]

In all these pictures, the empty set is missing (-: . Of course you could argue that they’re also missing in Venn diagrams, but it’s common to just point on the outside.

[bmm6o]

One example included the empty set, the other did not. It doesn't always make sense to have it.

[amelius]

The three lightgray circles in the examples are the empty set.