This led Lorenz to realize that long-term weather forecasting was doomed.
His simple model exhibits the phenomenon known as "sensitive dependence on initial conditions." The term butterfly effect was applied in Chaos Theory to suggest that the wing movements of a butterfly might have significant repercussions on wind strength and movements throughout the weather systems of the world, and theoretically, could cause tornadoes halfway around the world.
A stagehand carries the acoustic stand to Eric and he plays the outro on the acoustic (because Zach would have been playing the outro solo).
Lorenz had entered the rounded-off data from the printouts assuming that the difference was inconsequential.
For example, even today temperature is not routinely measured within one part in a thousand.
He set out to construct a mathematical model of the weather, namely a set of differential equations that represented changes in temperature, pressure, wind velocity, etc.
In the end, Lorenz stripped the weather down to a crude model containing a set of 12 differential equations.
The concept of small variations producing the butterfly effect actually predates science and finds its home in science fiction.