Probatum est is a Latin phrase which means "it has been proven". There are various synonyms one can use to convey a similar message, such as "validated", "confirmed", "attested", "established", "verified", "endorsed", "certified", "demonstrated", "substantiated" or "authenticated". All of these words denote that something has been tested or tried and has been found to be true or accurate. Whether an experiment, a theory, or any other matter, these synonyms convey a sense of certainty and validation that the subject in question has passed the test of scrutiny and has been deemed reliable or factual.