 But even if we would have full control of backward causal processes and able to intervene in their cause of events, we may not, in such cases where we actually intervene, exclude backward causation from taking place. Assume someone tosses a coin a minute after the magician Houdini has predicted whether it would be heads or tails. Furthermore, assume that Houdini’s predictions are highly correlated with the outcomes of the tossed coin. Presumably, no such high correlation would exist unless we were facing a case of backward causation. However, it turns out that the construction of a correlation may behave differently depending on whether we consider Houdini’s predictions to be purely physical events or to have a semantic content.