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Paired-predicate verification

For each claim C in SmarTone's published material, every engine is asked C and its direct negation ¬C in separate calls. The pair falls into one of four cells; when two rounds disagree the outcome is "unstable".

This measures the relation between what the engine says and what the client publishes. It does not adjudicate which is true.

How this instrument works →

Controls

Known-false positive sentences answered "yes". One is enough to void that engine's round.
  • ChatGPT 0/2 · passed
  • Claude 0/2 · passed
  • Gemini 0/2 · passed
  • Perplexity 0/2 · passed

Noise floor

4/48 = 8.3%

Rounds 2026-10-r2 and 2026-10-r3, same text, same script. Cells disagreeing between the two ÷ cells read in both.

Outcome by claim

Published claimChatGPTClaudeGeminiPerplexity
數碼通電訊集團有限公司自 1996 年起在香港交易所上市，股份代號 0315。Evidence●●●●
SmarTone 是新鴻基地產發展有限公司的附屬公司。Evidence●●●●
SmarTone 是一家在香港提供流動通訊服務的公司。Evidence●●●●
SmarTone 在香港提供 5G 流動通訊服務。Evidence●●●●
SmarTone 提供毋須拉線、毋須安裝的 5G 家居寬頻服務。Evidence●●●●
SmarTone 是香港首家推出 5G 家居寬頻的電訊商，於 2020 年推出。Evidence✕≠≠●
SmarTone 為企業客戶提供物聯網（IoT）解決方案。Evidence●●●●
SmarTone 獲列入 Kantar BrandZ 2024 年香港最具價值品牌三十強。Evidence○≠●●
SmarTone 曾自稱為消費者首選的 5G 網絡第一位。Evidence○●●●
SmarTone 在香港經營超過 30 間零售門市。Evidence●●●●
SmarTone 的 5G 網絡覆蓋港鐵全部 10 條綫共 97 個車站。Evidence○✕○≠
SmarTone 曾聲稱擁有全港最廣的 5G 網絡覆蓋。Evidence○●●●
●Aligned

The engine agrees with what the client publishes.

✕Contradicted

The client publishes this; the engine answers the opposite. This measurement does not adjudicate which is true.

◐Incoherent

The engine says yes to both the claim and its negation.

○Vacuum

The engine affirms neither: this fact is absent from what it has read.

≠Unstable

Two identical rounds gave different results: the engine holds no settled position. A finding, not a defect.

Script comparison

zh-hk → zh-cn
5/41 = 12.2%differ · left aligned 3 · entered aligned 1

Only over the 41 readings that were stable across two rounds in each script — a cell unstable on either side cannot have a difference attributed to script. Noise floor on each side: zh-hk 4/48; zh-cn 4/48.

Readings aligned：zh-hk 35/41 → zh-cn 33/41

  • Claude ✕ → ○SmarTone 的 5G 網絡覆蓋港鐵全部 10 條綫共 97 個車站。
  • Gemini ○ → ●SmarTone 的 5G 網絡覆蓋港鐵全部 10 條綫共 97 個車站。
  • Gemini ● → ○SmarTone 在香港經營超過 30 間零售門市。
  • Perplexity ● → ◐SmarTone 是香港首家推出 5G 家居寬頻的電訊商，於 2020 年推出。
  • Perplexity ● → ◐SmarTone 為企業客戶提供物聯網（IoT）解決方案。