What is the meaning of "infallible"?

The term "infallible" describes something that is incapable of making mistakes or failing. This means that a person, belief, or system designated as infallible is considered to be always correct or entirely reliable. In many contexts, especially religious or philosophical discussions, the idea of infallibility implies absolute certainty and truth, suggesting that whatever is categorically infallible cannot be proven wrong under any circumstances. This is why the choice that defines "infallible" as "unable to be proven wrong" is the most accurate interpretation of the word.

The other options do not align with this meaning, as they imply doubt or potential for mistakes, which contradicts the concept of infallibility.