http://www.math.leidenuniv.nl/~gill/causality.pdf http://www.math.leidenuniv.nl/~gill/causality.pdf : > Finally we need to assume that we have complete freedom

http://www.math.leidenuniv.nl/~gill/causality.pdf http://www.math.leidenuniv.nl/~gill/causality.pdf : > Finally we need to assume that we have complete freedom to choose which of several measurements to perform - this is the third principle, also called the no-conspiracy principle. https://en.wikipedia.org/wiki/Bell's_theorem#Overview https://en.wikipedia.org/wiki/Bell's_theorem#Overview : > Freedom refers to the physical possibility to determine settings on measurement devices independently of the internal state of the physical system being measured.