Trust, measured
BioSignal does not ask you to trust it. This page publishes what BioSignal holds, how often its answers are right, how often they are wrong, and what it has not yet earned the right to claim. Every number below is generated by an audit that runs against the live repository. None of them is typed by a person.
Measured 18 July 2026
The library
What BioSignal currently holds. Counted from the live knowledge graph.
Knowledge objects
Signal Records
Foundations
Conditions
Biomarkers
Comparisons
Body Systems
Peptide Families
Retrieval quality
How often Ask BioSignal is right — measured against 596 real consumer health questions, written the way people actually type them, across 22 clinical specialties. The corpus was not chosen to be easy, and it is allowed to fail.
Questions evaluated
Correct answers
Retrieval precision
Retrieval coverage
Misroutes
False declines
Honest declines
The four things that can happen when you ask a question
- Correct answer
- BioSignal holds an object that answers the question, and returned it.
- Honest decline
- BioSignal has not published on the subject, and says so rather than guessing. This is working as designed. A system that always answers has taught you that its confidence is free.
- False decline
- BioSignal holds the answer and failed to retrieve it. A bug in retrieval, not a gap in the library. It costs you a session and it costs us nothing but embarrassment.
- Misroute
- BioSignal answered confidently with the wrong object. This is the only unacceptable outcome, because you cannot detect it. A decline costs a session; a misroute costs the platform. We publish the count.
Editorial integrity
The standards BioSignal holds itself to, and whether it is currently meeting them. Each row is an audit that runs on every commit.
Editorial System
Product & Design Standard
Signal Records meeting the publishing standard
Records with verified references
Ask regression audit
Round-trip integrity
Forbidden-route audit
Broken graph edges
Last editorial review
Objects updated this month
External accountability
What BioSignal has not yet earned. These rows will read “Not yet” until they are true, and they will not say “coming soon.”
Named clinical reviewers
Editorial board
Independent clinical audit
BioSignal content is written to a physician-grade editorial standard — a five-phase pipeline, a published evidence-rating framework, and citations verified to source. But no external clinician has yet signed off on the library. Until one has, this page says so. The absence of a claim is itself a claim, and we would rather make it out loud.
How these measurements work
The audits run against the live repository. They compile the real retrieval engine from source on every run — there is deliberately no way to run them against a cached build, because a check that reads a stale copy of your code is not checking your code. It is checking your memory of it.
Every number on this page is generated, not entered. A separate audit fails the build if this page ever contains a hand-typed statistic. A trust metric a person types is a marketing claim; a trust metric an audit emits is a measurement.
The coverage corpus is allowed to fail, and it is not a gate. It is a set of 596 real-language questions BioSignal did not choose to be easy, kept deliberately outside the build gates. The moment a measurement becomes a target, people start making the number go up instead of making the product better — and the cheapest way to raise a coverage score is to delete the hard questions.
Passing every regression test and answering real questions are different things. BioSignal passes 141 of 141 of its regression suite — and every query in that suite is one it has already fixed. That is why it is not the number on this page. The corpus is, because the corpus is the one that can still surprise us.