Non-relativistic classical physics can be considered from a contextual perspective. At fi rst glance, the difference between classical physics (including special relativity) and quantum physics lies in the fact that the latter is indeterministic – that is, in general, the context of a quantum event cannot be controlled. However, within the framework of our contextual realism, we interpret physical theories – including classical ones – as grammars of corresponding scientifi c practices: rules of Wittgensteinian language games, that is, Wittgensteinian rules/norms (W-rule). Any theory, as a W-rule, is essentially probabilistic, since a W-rule allows for new (non-predetermined) uses. Th erefore, classical mechanics, like quantum mechanics, must be given an essentially probabilistic interpretation, and the problem of measurement – that is, the gap between the W-rule and its application – exists in classical mechanics as well.