 Dennett (1985, 1987) assumes that, in principle, an ideal physics trades in non-probabilistic laws capable of yielding perfect forward-facing predictions and perfect backward-looking explanations. By comparison, FP, though of great practical value, can never come close to the predictive and explanatory successes of the hard sciences: hence we have no reason to take FP’s posits as ontologically seriously as we take those found in the hard sciences. Thus, for Dennett, FP constructs can be treated as only capturing mildly real patterns: they are to be regarded as no more and no less real than numbers, centers of gravity, or other “calculation-bound” entities (Dennett 1991).