Bell-type Inequalities from Separate Common Causes

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Grasshoff, Gerd; Wuethrich, Adrian
conference paper description
In the light of recent discussions we present the main results of our project, the aim of which was to derive a Bell-type inequality from the weakest possible assumptions. A principal outcome of the project is that a Bell-type inequality can be derived from the assumption of separate common causes (Graßhoff, Portmann and Wüthrich 2005), even without the assumption of perfectly anticorrelating event types (Portmann and Wüthrich 2007). We also address the critique that in Graßhoff et al. (2005) we implicitly assume a common common cause (Hofer-Szabó forthcoming).