Rule of threes (survival)

[1][2][3] The rule, depending on the place where one lives, may allow people to effectively prepare for emergencies[4] and determine decision-making in case of injury or danger posed by the environment.

For example, if you have a large quantity of food and water yet are exposed to the environment, then the harsh conditions rule applies.

For example, it might be said that it takes a three-second psychological reaction time to make a decision during an emergency,[1] that you can survive 3 minutes in icy water,[5] or that an individual can last three months without hope (or companionship).

However since they stopped the experiment before being in any real danger, the actual survival time at room temperature likely exceeds 3-4 days.

[8] One person was purported to survive 7 days in the desert, 6 of these without water, without suffering heat stroke as the temperature reached no higher than 103.2 °F (39.6 °C) during his ordeal.