With this idea for describing a finite set of sets, it is easy to generalize the concept to a certain infinite family 𝒮₂ of sets 𝒮₂=A_i|i∈N=A_1,A_2,A_3,…,A_n,…. Once again, the power of set builder notation triumphs. The sets 𝒮₁ and 𝒮₂ may be described more precisely with set builder notation than by enumeration.

Before 1914 the Russian economy was on track to outperform that of France and Britain within a decade.

He blushed to see another Sun below, / Ne durst again his fiery face outshow.

Objectively, Miles realizes that Hayden is insane and past the point of rescue or readoption into mainstream society.