Just checked wikipedia: "By contrast, a system with a truly negative temperature in absolute terms on the kelvin scale is hotter than any system with a positive

Just checked wikipedia: "By contrast, a system with a truly negative temperature in absolute terms on the kelvin scale is hotter than any system with a positive temperature. If a negative-temperature system and a positive-temperature system come in contact, heat will flow from the negative- to the positive-temperature system." Let's define wikipedia to be the absolute zero of information.