Intuition before math

One vivid analogy per hard idea, and we say exactly where the analogy breaks.

Figures you can play with

Sliders, play buttons, real interaction. You build the understanding by doing, not by staring at a static diagram.

Verified against the source

Checked against the primary literature. We flag where the paper itself is wrong.

Reads like a human

Written and edited by hand, not generated and dumped. Made to be read for thirty minutes, not skimmed.