accuracy — The accuracy of information or measurements is their quality of being true or correct, even in small details.
certainty — Certainty is the state of being definite or of having no doubts at all about something.
correction — Corrections are marks or comments made on a piece of work, especially school work, which indicate where there are mistakes and what are the right answers.
truth — the true or actual state of a matter: He tried to find out the truth.