  A property (value of an observable) might be causally context-dependent in the sense that it is causally sensitive to how it is measured. The basic idea is that the observed value comes about as the effect of the system-apparatus interaction. Hence, measuring a system via interaction with a P-measuring apparatus might yield a value v(g(P)), measuring the same system via interaction with a Q-measuring apparatus a different value v(f(Q)), although both observables are represented by the same operator f(Q) = g(P). The difference in values is explained in terms of a context-dependence of the observables: The latter are context-dependent, since the different ways to physically realize them causally influence the system in different ways and thereby change the observed values.