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Some private notes carried by an aide to a Conservative MP have been made public by the media. The notes included a reference to the EU single market with the words "what's the model? Have your cake and eat it". Does quantum mechanics have an explanation which would allow us to eat the cake and still have it uneaten? Dr Hamish Johnston, editor of physicsworld.com, explains to Â鶹Éç Radio 4's PM programme that Brexit is like Schrödinger's cat theory. He says "you would be able to have the cake but it would be in two different places, and as soon as you start eating the cake, it appears where you are, but it doesn't exist in the other location". So, " you either have your cake or you eat it, but not both". Simple. (Photo: Two people eating cake Credit: iStock)
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