What does "infallible" describe?

The term "infallible" means being incapable of making mistakes or being wrong. It describes an absolute certainty or reliability in judgment, decision-making, or actions that are always correct. This aligns directly with the idea of being unable to be proven wrong, which is inherent in the definition itself. Infallibility suggests a level of authority or precision that reigns over doubt, making it a strong descriptor for beliefs, doctrines, or systems that are perceived as flawless. Understanding this helps clarify why the correct answer reflects the strongest association with the term.