Sometimes decisions get made and it ends up being God doing for you what you couldn't do for yourself.
The idea seems to be to use the next treaty talks to strike a grand bargain: Britain will be helpful to those states wishing to establish a fiscal union among themselves if, in exchange, we can amicably derogate from the aspects of the EU which we dislike.
Finally there are simple ideas of which no definition can be given; there are also axioms or postulates, or in a word primary principles, which cannot be proved and have no need of proof.

