in·fal·li·ble /(ˌ)ɪnˈfæləbəl/
 (a.)絕無錯誤的,絕對可靠的一貫正確的人


 In·fal·li·ble a.
 1. Not fallible; not capable of erring; entirely exempt from liability to mistake; unerring; inerrable.
 2. Not liable to fail, deceive, or disappoint; indubitable; sure; certain; as, infallible evidence; infallible success; an infallible remedy.
    To whom also he showed himself alive, after his passion, by many infallible proofs.   --Acts i. 3.
 3. R. C. Ch. Incapable of error in defining doctrines touching faith or morals. See Papal infallibility, under Infallibility.

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 infallible
      adj : incapable of failure or error; "an infallible antidote"; "an
            infallible memmory"; "the Catholic Church considers the
            Pope infallible"; "no doctor is infallible" [ant: fallible]