 Another feature that theses (A)–(D) have in common is that they appeal quite freely to arbitrary real-valued quantities. This is explicit in (B). To see why they all appeal to arbitrary real-valued quantities, consider that most physical theories assume that many physical magnitudes, including time, can take arbitrary real numbers as values. Hence, systems of physical equations, whose simulations, solutions, or observables are appealed to, respectively, by (A), (C), and (D), involve arbitrary real numbers. Therefore, all formulations of Bold Physical CTT involve, explicitly or implicitly, arbitrary real numbers.