  Results of measurements give legitimacy to a physical theory. What if
acquiring these results in the first place necessitates what the same theory
considers to be an interaction? In this note, we assume that theories account
for interactions so that they are empirically traceable, and that observations
necessarily go with such an interaction with the observed system. We
investigate consequences of this assumption: The unfolding language game,
inspired by "quantum logic," leads to a class of contextual and probabilistic
theories. Contextuality becomes a means to render interactions, thus also
measurements, empirically tangible. The measurement "problem" arises in all
such theories, not only quantum mechanics: It is a consequence of the need for
empirical evidence of interactions. And a consequence of the converse need for
an interaction when obtaining that empirical evidence.
