[ivxvm]

Maybe it simply doesn't understand Venn diagrams well - after all, it's a visual concept.

[glenstein]

My thinking is that it relates to organizing concepts into categories, which can challenge a system to prove how deep it is capable of going into abstract associations, and searching through a full range of possible abstract associations.

I suspect ChatGPT probably can be reasonably effective at understanding, or pretending to understand numerous other visual concepts.