Your Tests Pass. Your Code Is Broken.

15 functions that pass every test. All 15 are wrong. BRIK-64 catches them all.

The Comfortable Lie

Green test suite. 100% coverage. Code review approved. Ship it.

Except the function that rounds prices has a floating-point comparison that fails for exactly one value in ten thousand. The accumulator that sums transaction amounts silently overflows after 2,147,483,647 cents. The string parser handles every test case perfectly — unless the input is exactly 255 characters long, at which point it truncates silently and returns a valid-looking but wrong result.

Tests verify specific inputs. They cannot verify all inputs. And the bugs that matter most are the ones that hide in the inputs nobody thought to test.

15 Functions. 15 Hidden Bugs.

We assembled 15 real-world functions — pricing calculations, data validators, string formatters, accumulator patterns — each with a comprehensive test suite. Every test passes. Every function contains a bug that the tests miss.

BRIK-64's TCE catches all 15. Not because it runs more tests, but because it operates on the mathematical structure of the computation. It does not ask "does this work for these inputs?" It asks "is this circuit closed for all inputs within the declared domain?" Different question. Different answer.

See for Yourself

The full demo — all 15 functions, their passing test suites, the specific inputs that trigger each bug, and the TCE diagnostics — is available to run locally:

git clone https://github.com/brik64/brik64-demos.git
cd brik64-demos
./run_demo.sh demo3-error-elimination

For the complete technical breakdown of each bug category and reproduction steps:

View all demos on Digital Circuitality →

Your tests pass. That is necessary. It is not sufficient. Certification is not testing. Φ_c = 1 means correct for all inputs.