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Plus the zeroth law: "A robot may not harm humanity, or, by inaction, allow humanity to come to harm."

R refers to reproduction and 0 to the zeroth generation, as in patient zero.

“To zeroth order, our ideas of how these things formed seem to be vindicated,” he says.

They also got a serious obesity epidemics, too much good cheap food and zeroth physical activity.

If 13 is the first term, can you find the zeroth term and finally nail down the elusive 14th term using the method of finite differences?