Flutterby™! : Turing QOTD, tying in to our politics discussions

Another quote from Alan Turing, writing in November of 1946:

How can the rules of a machine change? They should describe completely how the machine will react whatever its history might be, whatever chagnes it might undergo. The rules are thus quite time-invariant. ... The explanation of the paradox is that the rules which get changed in the learning process are of a rather less pretentious kind, claiming only an ephemeral validity. The reader may draw a parallel with the Constitution of the United States.

Quoted in Alan Turing: The Enigma, by Andrew Hodges, p.359.