diff --git a/kb/literature/README.md b/kb/literature/README.md
index 356a31e..fc418f0 100644
--- a/kb/literature/README.md
+++ b/kb/literature/README.md
@@ -19,8 +19,10 @@ One file per quantity per subject. `bleach-photons-alexafluor488.md`, not
 it came out of. One paper supplying three quantities becomes three files, each
 citing it. Files beginning with `_` are not entries.
 
-**No entries yet.** The schema and the rules are here first, so the first entry
-does not have to invent them.
+**One entry**, [`lifetime-ns-tritc.md`](lifetime-ns-tritc.md) — TRITC's
+fluorescence lifetime, which `G20` was refusing for want of. The schema and the
+rules were written first so that it did not have to invent them, and they held:
+nothing in the template needed changing to file it.
 
 ---
 
@@ -35,20 +37,37 @@ This repository has two evidence tiers, `measured` and `assumed`, and
 worth having: a gate that was returning `BLOCKED` for want of an input can
 instead *compute*, and report a margin, a bottleneck, and a difficulty grade.
 
-The photo-perturbation lens is the live case. `bleach_photons` is empty for every
-dye in `data/fluorophores.yaml`, so G10 has nothing to count against and the lens
-refuses. Supply the number and it computes — and still says no:
+The photo-perturbation lens is still the live case, and it is now a real one
+rather than an illustration. `lifetime_ns` was `null` for TRITC, so `G20` could
+not tell whether emission was linear in power and the lens refused:
 
 ```
-488 (AlexaFluor488) @ 470 nm  6.2 W/cm^2   ->  PASS_WITH_CHANGES
-feasibility: MARGINAL   evidence: assumed   confidence: low   advances: NO
+TRITC @ 555 nm  153.0 W/cm^2  ->  BLOCKED
+feasibility: UNKNOWN   evidence: assumed   confidence: none   advances: NO
+    [FAIL] missing.lifetime
+```
+
+Supply the number — 2.2 ns, free dye in PBS — and it computes:
 
-      0.20  perturbation.photobleaching          ##
 ```
+TRITC @ 555 nm  153.0 W/cm^2  ->  PASS
+feasibility: ROUTINE   evidence: assumed   confidence: low   advances: NO
+
+     10.00  perturbation.saturation     ##############################
+```
+
+**`advances: NO` beside a margin of 10.00 is the point**, and it is sharper than
+the version that used to sit here. That one showed a literature value producing
+a margin that said *no*, which is easy to accept. This one produces a margin
+that says *yes, comfortably* — and still cannot advance a verdict. A passing
+verdict is exactly where a reader is tempted to treat an assumed value as a
+measured one.
 
-That 0.20 margin is the point. It says ~100% of the label bleaches over 7200
-frames, which is actionable now, and it says so without claiming anyone measured
-this dye in this buffer under this illumination.
+> **This paragraph illustrated `G10` and `bleach_photons` until 2026-09-16.**
+> G10 was removed on 2026-09-09 ([kb/decisions/2026-09-09-g10-photobleaching-removed.md](../decisions/2026-09-09-g10-photobleaching-removed.md))
+> and the output above it was hypothetical. The photobleaching arithmetic it
+> described is kept in [04 §6](../../docs/04-decision-engine.md), which also
+> says why the gate went.
 
 If an entry here ever appears to make a verdict advance, that is a bug in the
 gate, not a licence.
@@ -57,8 +76,15 @@ gate, not a licence.
 
 **Belongs.** A number a gate consumes, which has no local measurement, whose
 published value is specific enough to transfer with stated caveats.
-`bleach_photons` per dye is the top example — [07 Phase 0](../../docs/07-roadmap.md)
-lists it as literature-or-decay-curve, and it is empty across the whole registry.
+`lifetime_ns` per dye is the worked example: `G20` reads it, five of seventeen
+dyes are still missing it, and no instrument here can measure it directly —
+that needs time-resolved detection this setup does not have.
+
+> This said `bleach_photons` was the top example, *"empty across the whole
+> registry"* and listed by 07 Phase 0 as literature-or-decay-curve. **No gate
+> consumes it now** — it went with G10 — and `docs/07-roadmap.md` no longer
+> names it. Still empty, and no longer a number anything is waiting on, which
+> is the difference between a gap and a hole.
 
 **Does not belong.**