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Definitions from the Web

Infallible

Definition:

Adjective: incapable of making mistakes or being wrong; unfailing in effectiveness or operation.

Sense 1:

Relating to a person or thing that is incapable of making mistakes:

Sample Sentence: The infallible mathematician solved the complex equation effortlessly.

Sense 2:

Relating to something that is unfailing in effectiveness or operation:

Sample Sentence: The infallible security system successfully detected any unauthorized access.

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