Welcome to the Unsolved Envelope Labeling Mysteries, where the greatest minds of the 19th century gathered to puzzle over the intricacies of adhesive labels and the human condition.

Here are some of the most baffling cases:

The Envelope Paradox

A 2010s-era tech entrepreneur claimed to have created an AI that could generate an endless supply of labels, but was actually just using his interns to label his cat.

We're still waiting for answers, but the mystery remains unsolved.