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Is the pattern in your numbers real?

Name the shape under a belief and you inherit the test the field that met it first already built. Your answers give a candidate diagnosis; your own counts turn it into a test.

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Built for the essay Your AI Stack Has Three Bugs Other Fields Already Fixed

The beliefs you build on

Write the load-bearing assumptions in your work: a trade-off you design around, an independence you rely on, a set of parts you trust not to pull each other along. Start with the one that would cost you most if it turned out to be an artefact of how you measured it.

Name the shape under each one and its verdict appears as you go. Open Test it with your numbers under a belief to check it against your own counts. New here? to watch it work.

What is really under each one

The three questions, to keep

Filter test. Found a trade-off? Ask what you filtered on. If you only see it inside a group that got in by clearing one bar or the other, part of it lives in the filter. That is a collider.

Extreme test. Relying on two things being independent? Ask what they do on the worst day. The calm-weather number lies first. That is tail dependence.

Loop test. Are the parts coupled through shared state? If one part changes an environment the others respond to, you have a loop, and agreement compounds without ever being independently earned. The fix is to damp the loop. That is resonance.

This result lives in its link, after the #, which browsers never send to a server. The link carries your beliefs, answers and numbers, and goes only where you send it.

A handful of mathematical structures run under your stack in different costumes: a trade-off that is really a filter, an independence that only holds on calm days, a swarm whose parts quietly start feeding each other.

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Name the shape under a belief and you inherit the test the field that met it first already built.

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The Structure Spotter pairs the essay Your AI Stack Has Three Bugs Other Fields Already Fixed on The Durability Curve. The three tests and the imported fixes are the essay's; this instrument runs them on your own beliefs. It stores nothing off your machine.