Regan is measuring her kitchen cabinets to provide a carpenter with the information to be able to make new cabinets. She is very careful and measures the existing cabinets several times. She found that her second and third measurements were identical to her first. Confident in her findings, she provides the measurements to the carpenter. When the carpenter comes to install the cabinets, however, they discover that they are much too small for her space. Frustrated, Regan shows the carpenter exactly how she measured them and the carpenter points out that the measurements needed to be from the outside of the cabinets rather than the inside. Is this a problem related to reliability, validity, both reliability and validity, or neither