A science club wanted to reduce the amount of water used in its greenhouse. Members first installed a timer, assuming that shorter watering periods would solve the problem. Water use fell, but several plants began to dry out because the timer treated every bed alike. The club then measured soil moisture in three locations. These measurements showed that the shaded bed stayed wet much longer than the bed near the door. Therefore, the members kept the timer but assigned a different duration to each bed. This change reduced water use without producing the earlier damage. The project taught the club to follow the links between sentences rather than relying on a single signal word. The phrase these measurements refers to the new evidence, therefore introduces the decision drawn from it, and this change points to the bed-specific schedule. When those links are visible, the order of the explanation can be rebuilt even if some vocabulary remains unfamiliar.