Unstudied (answerability)
No study addresses the question. Saying so IS the review.
The definition the product enforces, read from the same code the methodology page renders.
How to read it
When Unstudied appears on a page
No study addresses the question. Saying so is the review, and it is worth more than a page of adjacent findings presented as an answer.
The family
Literature review grades
What a body of studies is allowed to be said to show, and whether the question was studied as asked.
Convergent (literature)At least two INDEPENDENT named studies — different teams or datasets — point the same direction. The only grade that earns "the literature shows".Single study (literature)One named study only. A real measurement, but one measurement — never "the literature".Preliminary (literature)A preprint, pilot, working paper or small-n result that has not been replicated or peer-validated. Marked as what it is.Mixed (literature)Named studies genuinely disagree. The split is the finding; the sides are named, never averaged.Contested (literature)A published critique, failed replication, or retraction lead targets the supporting record. A finding, not noise.Not established (literature)The claim circulates — in coverage, marketing or folklore — without a study behind it that this review could find.Directly studied (answerability)The literature studied this question as asked.Adjacent only (answerability)The literature studied related questions — proxies, narrower populations, different timescales. Every finding names what was actually studied. Where you will see it
On these pages
Surfaces
The Literature Review page and its /p render
The rubric
The whole grading vocabulary, on one page
Every grade here is assigned by the same rules on every scan, and the methodology page renders those rules from the code that enforces them.