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Without fault or weakness; incapable of error or fallacy.
Middle English from Medieval Latin īnfallibilis Latin in- not in–1 Medieval Latin fallibilis fallible fallible
American Heritage Dictionary of the English Language, 5th Edition
From Medieval Latin infallibilis, from Latin in- + fallibilis. Compare French infaillible.
You're not infallible like me.
A dozen good articles do not make an author infallible.
It maintained that the church's infallible authority was committed to pope and bishops jointly.
Man cannot attain perfect and infallible science of bodies.
At the time, we felt so infallible in our rightness we grabbed the proverbial bull by the horns exposing ourselves to a wealth of trouble.
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