A person, thing, or source of information is considered "trustworthy" when it can reasonably be relied upon to perform as expected and/or promised. Trustworthiness generally stems from consistently positive performance of the person, thing, or source of information in question. Because of the danger of trusting the untrustworthy, as Ronald Reagan often said, it is important to "Trust, but verify." This applies especially in the case of one's paradigm.