Shape::TRIANGLE, 8 or Color::RED aren't concepts. They're merely symbols. In principle, you will find them encoded in some way under a microscope (as some arrangement of physical states, though it will depend on the particular physical medium what the particular arrangement will look like). Your computer program can process that physical state to mimic some aspects of reasoning, but that's entirely a matter of how the program is designed to operate with these physical arrangements. You cannot analyze or derive anything from the symbols qua symbols themselves because there's no meaning there to analyze or from which to derive things.