In a sentence
Six example sentences with infallible, each labelled with its topic.
No screening test is infallible, so the clinic repeats a positive result before anyone is told they have the disease.
Medicine
Speedrunners treat the frame timing as infallible until a rare desync throws the run off at the final boss.
Gaming
Court chroniclers described the emperor as infallible, so no minister dared point out that the harvest forecast had collapsed.
History
No spam filter is infallible, so the system lets users rescue a message it wrongly threw away.
Technology
The seminar asked whether any belief can be infallible, and even the claim that two and two make four drew a challenge.
Philosophy
The trader believed his model infallible until a single quiet Tuesday erased a year's gains.
Finance
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Found in these word lists
Found in 4 published word listsRecognized
Each source is a published word list that contains infallible. No exam board publishes an official GRE, GMAT or SAT list; GMAT words come from GRE lists and the Academic Word List.