The blind test

Which model built which pendulum?

Four untouched pendulums, shuffled into slots A–D with nothing to identify them. Run them, press RUN REFEREE, assign a model to every slot, then reveal. Fair warning: this round is hard — all four render, all four pass the physics. The tells are subtle.

Reveal the authors Reshuffle

Hints if you've read the study: one renders crisp on retina and reflows on resize; one spells out the fullest energy report and gives two separation metrics; one runs its 60-second audit asynchronously with a live progress bar instead of freezing the tab; one prints an R² on its Lyapunov fit. Two of them ran a real browser to grade themselves — but you can't see that from the outside.