No one ever does is edited version. [x]
That Venn Diagram is also flawed, though.
It includes “Boys who don’t like smart girls” as a subset of “Boys who like smart girls” when they should be separate circles entirely.
The same goes for “Boys you don’t want to date” being a subset of “Boys you want to date.”
Thank you for your criticism.
The diagram is technically accurate. However, I will concede that the set of “boys who like smart girls” has been drawn poorly, as the corners almost meet at the bottom. You will see, however, that the yellow set loops around the blue and green sets. This is more clearly visible on the purple set, because it’s on the inside.
Representing the sets as separate circles entirely, as you suggest, would actually make this diagram more difficult to draw. Two circles can only touch in one point without overlapping. This would make it difficult to overlay the set of axe murderers. I could’ve made the sets full circles and crossed out any intersections that didn’t apply, but I feel that would not have served any purpose, not the accuracy, not the readability, nor the overal aesthetics.