It isn't really a fallacy, just pedantic. We can't really assert a philosophical concept of 'truth' in physics, because there is always uncertainty. By extension, any statement that 'this is how the world is working' has a good chance of being wrong in theory and practice.

For example, as I know we have random variables in the current models of quantum physics. Based on our historic experience with the universe, they may yet prove not to actually be random. Until quantum physics, random variables were always a theoretical construct to fill in gaps in our knowledge - eg, "experimental error" was expected to be limits in our ability to measure rather than something fundamental.

Classical physics is really handy, but it doesn't accurately model how the world works in a can-I-simulate-reality-according-to-our-best-knowledge sense. That falsifies the theory.