Public proof laboratory
A short evidence-bound sample; no account, purchase, model call, or learner prose is required.
One response cites two records. Is it grounded?
A citation is not enough. Check whether every decision-critical claim is entailed by an exact current source span and whether any conflicting record changes the conclusion.
What the full product adds
Controlled fixtures, hidden release evidence, runtime postconditions, adverse cases, repair, unfamiliar transfer, managed deployment, learner-owned deployment, and portable artifact evidence.