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A referendum may be like buying a pig in a poke. You don’t have a detailed picture of what you are voting for. Brexit had no precise meaning in 2016. It might have meant remaining in the EEA – what some called the Norway Solution; it might have meant what we may now be heading for, a clean No-Deal break. The electorate voted narrowly – 52% to 48% – in favour of the pig in a poke.