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CB-EV-0020: a gate moved the rule, and the report was wrong

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The AM-1 coverage gate failed the build on GR-P05 being uncovered, which
is what showed the rule was in the offer layer rather than in validate.
A rule enforced only by the offer is enforced only for clients that ask
what is legal. The gate did not catch a bug, it caught a design error.

And the reported case was not the one reported. CB-WP-0018, CB-EV-0016
and the message to ground-game all described SOLVE offered on a
face-down Problem; validate already rejected face-down, so it never was.
Problem 1 is the Surface Problem, face-up from the deal, so the three
inert SOLVEs were the HAND case. The ruling covers both so nothing is
invalidated, but a ruling was requested on a wrong description -- the
second time in three passes that a premise reached ground-game
unchecked, after the '12 points available' that voided GR-E01.

Two of two. The pattern is not careless analysis; it is that a claim gets
SENT the moment it is interesting and checked afterwards. Unexecuted
verification, one step further out: not a belief acted on, but a belief
published. CB-WP-0022's reproduction rule would have caught both.

An earlier mutation run reported three survivors and was wrong -- the
replacement strings did not match, so nothing was mutated. It proved
nothing and looked like a result.

Also renames CB-WP-0022-T06B to T07; the hub flagged it as an
unregistered species.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
tegwick 2026-08-04 00:21:21 +02:00
parent 7a43de3f2a
commit abd62c5567
5 changed files with 148 additions and 1 deletions
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4
workplans/CB-WP-0023-solve-legality.md
View file

@ -3,6 +3,7 @@ id: CB-WP-0023
kind: product
title: "SOLVE is offered only where it can do something"
status: done
state_hub_workstream_id: "ae3a1491-4417-4cb2-b490-b694463cc171"
---
# Purpose
@ -45,6 +46,7 @@ exists to stop.
id: CB-WP-0023-T01
status: done
priority: high
state_hub_task_id: "52637f6f-314f-4715-9d81-5e9bea8ced97"
```
SOLVE is offered on problem `p` for seat `s` **iff** `p.face_up`,
@ -101,6 +103,7 @@ inverting the layering assertion turns `validate_enforces_all_four` red.
id: CB-WP-0023-T02
status: done
priority: medium
state_hub_task_id: "4a436635-2eff-42b1-957c-fdb8b310f910"
```
Update `specs/GroundRules.md` §Underdetermined for the SOLVE items, and
@ -124,6 +127,7 @@ scenario rather than left as a gap.
id: CB-WP-0023-T03
status: done
priority: high
state_hub_task_id: "3a05165c-df33-4668-8ca2-2340789b3531"
```
`evidence/CB-EV-0020-*.md`. Short.