Problem: A family member has felt very sluggish during the day and has an aversion to light. But at night the family member has lots of energy. A physician orders extensive blood tests and based on the results, the physician informed your family member that they have been bitten by a vampire and is in the process of turning into one. You would very likely go to another doctor. Which of the following is the guideline for assessing truth that informs your rejection of the physician's diagnosis?