Dogbert sits in a chair across from a man. Dogbert says, "Every person has natural daily rhythms of mental peaks and troughs. We can use this knowledge to improve your performance." Dogbert hands the man a thermometer and continues, "We use hourly body temperature readings to identify and avoid the troughs." As the man leans back in his chair and waves his arms, Dogbert writes, "One o'clock. We have encountered a severe trough. I fear it could be the dreaded 'El Nino' trough."