The present is the past rolled up for action, and the past is the present unrolled for understanding. —Will and Ariel Durant, The Reformation
THEOREM 5. In any finite automaton (in particular, in a McCulloch-Pitts nerve net), started at time 1 in a given internal state S1, the event represented by a given state existing at time p is regular. —S. C. Kleene, Representation of Events in Nerve Nets and Finite Automata