Infallible

Infallible has two meanings; one is "without error" the other that "it fulfills its intended function." A dull knife can be an infallible knife if you use it to cut butter. You will weaken the statement by putting in that word. I know it's your pet word, and it's the pet word of a lot of people, but it isn't as strong as the words "without any mixture of error."--from Interview Concerning Hobbs' Defense of Baptist Faith and Message Wording on the Bible