 However, the entropic account faces some very severe challenges. First, do footprints on beaches have well-defined thermodynamic entropies? To describe the example we switched from low-entropy to high order, but the association between entropy and our ordinary concept of order is tenuous at best and usually completely misleading. (To appreciate this, just consider what happens to your salad dressing after it is left undisturbed. Order increases when the oil and vinegar separate, yet entropy has increased.) To describe the range of systems about which we have knowledge, the account needs something broader than the thermodynamic entropy. But what? Reichenbach is forced to move to a notion of quasi-entropy, losing the reduction in the process. Second, the entropic account doesn’t license the inference to a human being walking on the beach. All it tells you is that the grains of sand in the footprint interacted with its environment previously, which barely scratches the surface of our ability to tell detailed stories about what happened in the past. Third, even if we entertain a broader understanding of entropy, it still doesn’t always work. Consider Earman’s (1974) example of a bomb destroying a city. From the destruction we may infer that a bomb went off; yet the bombed city does not have lower entropy than its surroundings or even any type of intuitively higher order than its surroundings.