Last Updated
：2025/11/21
infallible
IPA(Pronunciation)
（ comparative ）
（ superlative ）
Quizzes for review
Without fault or weakness; incapable of error or fallacy. / Certain to produce the intended effect, sure.
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infallible
Even the most experienced detective knew that no theory was infallible, so he kept testing every possibility.
See correct answer
Even the most experienced detective knew that no theory was infallible, so he kept testing every possibility.
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