Would say that heuristics, rules of thumb, or intuitions are "computations" or trials and errors (or "assumptions from observations")? If it's the former, I wonder whether "computation" is being stretched too thin. There are whole ontologies built up around "information," according to which information is deeper than physicality.
I take a neo-Kantian, pragmatic view of knowledge, which I've written about below. The question for me is whether there's such a thing as purely objective knowledge, or whether that's oxymoronic.