unfiled

One idea a week: biases, paradoxes, and mental models.

Subscribe

unfiled is a weekly newsletter from xotes about how thinking works. Each Wednesday, one idea: a cognitive bias, a paradox, or a mental model, explained plainly and kept short. New subscribers get a free guide to starting a commonplace book, the notebook habit behind the newsletter. Free to read. Unsubscribe anytime.

Featured Issue

Does a green apple prove all ravens are black?

A strange puzzle about what counts as evidence.

See how this newsletter's subscribers and engagement have changed over time.

Unlock with Pro