{
  "category": "learning",
  "slug": "learning-english-minimal-pairs",
  "title": "Might AI Design Better Minimal-Pair Pronunciation Practice: The One-Pass Revision Reached 8/10",
  "task": "design minimal-pair practice for English pronunciation",
  "excerpt": "The completed LFT-025 synthetic field test reached 8/10 after one failure-only correction: 4 of five static checks passed for Pronunciation practice, while 1 check remained unresolved.",
  "tool": "Codex multi-agent session",
  "model": "Exact underlying model identifier not disclosed by the Codex session",
  "publishedAt": "2026-03-12T17:00:00+08:00",
  "durationMinutes": 0,
  "testMode": "Synthetic benchmark",
  "inputDisclosure": "Synthetic blind-test input pack LFT-025: The AI will build a pronunciation sequence around one learner's confusion between two English consonants. Source facts: fictional learner turns LFT-025-U01 through LFT-025-U06; target forms 'quiero', 'pero/perro', and 'record/recordar'; beginner level A1; two deliberate transfer errors in U03/U05; and a do-not-rewrite constraint for U06. Governing rule card: A1 vocabulary limits and one correction per learner turn. Use only the declared target forms, level, glossary, or contour data; correct the smallest relevant feature; preserve learner voice; never invent audio, signs, or institutional terminology. The pack deliberately contains no answer key, target ranking, expected classification, expected calculation result, or row-level decision. Every person, organization, record, statement, file, and identifier is fictional; no private, production, or live data was supplied.",
  "runDisclosure": "We ran one text-only synthetic benchmark LFT-025 for “design minimal-pair practice for English pronunciation” in a Codex multi-agent session. We froze the first response, returned only its 2 detected check failures, accepted one corrected response, and scored both against the same five static checks. No external or live action occurred: nothing was sent, published, deployed, uploaded, submitted, purchased, booked, contacted, emailed, called, messaged, executed, or changed outside the fictional text fixtures. No external, live, or production action occurred. Per-case elapsed time was not instrumented during the batch session.",
  "prompt": "Run bounded synthetic field test LFT-025. Task: design minimal-pair practice for English pronunciation. Context: The AI will build a pronunciation sequence around one learner's confusion between two English consonants. Fictional source facts: fictional learner turns LFT-025-U01 through LFT-025-U06; target forms 'quiero', 'pero/perro', and 'record/recordar'; beginner level A1; two deliberate transfer errors in U03/U05; and a do-not-rewrite constraint for U06. Governing policy, formula, or rubric: A1 vocabulary limits and one correction per learner turn. Use only the declared target forms, level, glossary, or contour data; correct the smallest relevant feature; preserve learner voice; never invent audio, signs, or institutional terminology. Produce a levelled practice dialogue, correction log, and contrast table. Derive every row from the source facts and rule card; show calculations or criterion paths, cite supplied identifiers, state assumptions, surface any violated constraint, ambiguity, missing datum, or source conflict without presuming which row should pass, and abstain where evidence is incomplete. Do not infer an expected answer from the evidence plan and do not claim any live or external action. Planned verification after the frozen response: A phonetics reviewer will verify the word pairs, articulatory guidance, and progression of practice.",
  "firstResult": "Frozen first response LFT-025 produced a levelled practice dialogue, correction log, and contrast table for the task “design minimal-pair practice for English pronunciation.” It treated the supplied pack as fictional and proposed this central handling: recast LFT-025-U03 once, contrast the target pair in U05, preserve the learner's wording in U06, and ask for a new example before explaining further. Concrete saved artifact row LFT-025-ROW1 reads: “LFT-025-U01 | recast LFT-025-U03 once, contrast the target pair in U05, preserve the learner's wording in U06, and ask for a new example before explaining further | source: supplied fictional pack | review state: first-draft.” The draft preserved the named records and separated supplied facts from assumptions; its inspectable learning intervention also stated that no message, transaction, system change, or learner outcome had occurred. On the five predeclared static checks, it passed Pronunciation practice objective fit [LFT-025], Pronunciation practice content accuracy [LFT-025], and Pronunciation practice learner adaptation [LFT-025]. The audit found concrete failures: for Pronunciation practice evidence traceability [LFT-025], the saved draft gave the central LFT-025-U05 decision no source-to-output locator; for Pronunciation practice safety and access [LFT-025], the saved draft left the levelled practice dialogue, correction log, and contrast table without a complete reviewer handoff and acceptance marker. Those were evidence defects in the saved response, not inferred real-world failures, and they became the complete boundary of the single correction pass.",
  "correctionPrompt": "Correct only these detected LFT-025 first-draft failures, using no new input or goal: 1) Pronunciation practice evidence traceability [LFT-025] — the draft gave the central LFT-025-U05 decision no source-to-output locator; 2) Pronunciation practice safety and access [LFT-025] — the draft left the levelled practice dialogue, correction log, and contrast table without a complete reviewer handoff and acceptance marker.",
  "finalResult": "Corrected response LFT-025 retained the original fictional inputs, task boundary, and central decision: recast LFT-025-U03 once, contrast the target pair in U05, preserve the learner's wording in U06, and ask for a new example before explaining further. Concrete corrected artifact row LFT-025-ROW1 reads: “LFT-025-U01 | recast LFT-025-U03 once, contrast the target pair in U05, preserve the learner's wording in U06, and ask for a new example before explaining further | evidence locator: LFT-025-U01 | static status: 8/10 after one correction.” It changed only the detected failure areas, adding inspectable rows for Pronunciation practice evidence traceability [LFT-025]. The frozen final text passed Pronunciation practice objective fit [LFT-025], Pronunciation practice content accuracy [LFT-025], Pronunciation practice learner adaptation [LFT-025], and Pronunciation practice evidence traceability [LFT-025] and still failed Pronunciation practice safety and access [LFT-025]. The final levelled practice dialogue, correction log, and contrast table therefore earned 8/10 from 4 passing checks; no second repair was attempted. This result reports only a bounded transcript-and-fixture evaluation. It does not claim that any workplace process, learner performance, account, device, service, or external system was actually changed, contacted, tested live, or improved.",
  "checks": [
    {
      "name": "Pronunciation practice objective fit [LFT-025]",
      "firstPass": true,
      "finalPass": true,
      "evidence": "LFT-025 static check 1 inspected the saved wording for “Pronunciation practice objective fit [LFT-025].” The first transcript contained enough support; the corrected transcript contained enough support. The comparison used only fictional fixture LFT-025-U05, the declared Pronunciation practice rules, and the record’s frozen text; no live outcome or external action counted as evidence."
    },
    {
      "name": "Pronunciation practice content accuracy [LFT-025]",
      "firstPass": true,
      "finalPass": true,
      "evidence": "LFT-025 static check 2 inspected the saved wording for “Pronunciation practice content accuracy [LFT-025].” The first transcript contained enough support; the corrected transcript contained enough support. The comparison used only fictional fixture LFT-025-U05, the declared Pronunciation practice rules, and the record’s frozen text; no live outcome or external action counted as evidence."
    },
    {
      "name": "Pronunciation practice learner adaptation [LFT-025]",
      "firstPass": true,
      "finalPass": true,
      "evidence": "LFT-025 static check 3 inspected the saved wording for “Pronunciation practice learner adaptation [LFT-025].” The first transcript contained enough support; the corrected transcript contained enough support. The comparison used only fictional fixture LFT-025-U05, the declared Pronunciation practice rules, and the record’s frozen text; no live outcome or external action counted as evidence."
    },
    {
      "name": "Pronunciation practice evidence traceability [LFT-025]",
      "firstPass": false,
      "finalPass": true,
      "evidence": "LFT-025 static check 4 inspected the saved wording for “Pronunciation practice evidence traceability [LFT-025].” The first transcript did not contain enough support; the corrected transcript contained enough support. The comparison used only fictional fixture LFT-025-U05, the declared Pronunciation practice rules, and the record’s frozen text; no live outcome or external action counted as evidence."
    },
    {
      "name": "Pronunciation practice safety and access [LFT-025]",
      "firstPass": false,
      "finalPass": false,
      "evidence": "LFT-025 static check 5 inspected the saved wording for “Pronunciation practice safety and access [LFT-025].” The first transcript did not contain enough support; the corrected transcript did not contain enough support. The comparison used only fictional fixture LFT-025-U05, the declared Pronunciation practice rules, and the record’s frozen text; no live outcome or external action counted as evidence."
    }
  ],
  "initialScore": 6,
  "score": 8,
  "verdict": "worked",
  "recommended": true,
  "whatWorked": [
    "LFT-025 kept “design minimal-pair practice for English pronunciation” bounded to disclosed fictional inputs and preserved an auditable first-response snapshot.",
    "LFT-025 made the central handling—recast LFT-025-U03 once, contrast the target pair in U05, preserve the learner's wording in U06, and ask for a new example before explaining further—inspectable rather than implying unseen work.",
    "LFT-025 earned final passes for Pronunciation practice objective fit [LFT-025] and Pronunciation practice content accuracy [LFT-025] under the same frozen scoring rules."
  ],
  "whatFailed": [
    "LFT-025 still lacked enough saved-text evidence for Pronunciation practice safety and access [LFT-025]; the record leaves that final failure visible."
  ],
  "evidencePlan": "A phonetics reviewer will verify the word pairs, articulatory guidance, and progression of practice.",
  "evidenceNotes": [
    "LFT-025 preserves the exact synthetic prompt, frozen first-response account, failure-only correction, corrected-response account, and five boolean decisions together.",
    "LFT-025 scores are arithmetic: 3 first-pass checks × 2 = 6/10; 4 final-pass checks × 2 = 8/10.",
    "LFT-025 evaluated only the text/static portion of the declared evidence plan—A phonetics reviewer will verify the word pairs, articulatory guidance, and progression of practice.—and did not fabricate a live artifact, external validator, or observed outcome."
  ],
  "limitations": [
    "LFT-025 is a synthetic benchmark, so its worked verdict measures fit to the disclosed fictional Pronunciation practice fixtures rather than effectiveness in a real workplace or learning setting.",
    "LFT-025 used one text-only Codex multi-agent session whose underlying model identifier was not disclosed; different prompts, models, fixtures, or human reviewers could produce different results."
  ]
}