 Lewis’s answer to that question comes from the fact that c leaves very many traces: at 8.02, for example, there is the egg cooking in the pan, the cracked empty shell in the bin, traces of raw egg on Gretta’s fingers, her memory of having just now cracked it, and so on. So in World 2, Gretta fails to crack the egg but then, shortly thereafter, seems to remember cracking it, there is the egg in the pan, the empty shell in the bin, and so on. So World 2 – since it contains all of these events without the egg being cracked in the first place – needs to contain not just one miracle but several: one to take care of each of these effects. World 1, by contrast, requires just the one small miracle to stop Gretta cracking the egg. Hence World 2 contains a ‘big, diverse’ miracle while World 1 contains just one small miracle; hence World 1 is closer to actuality than is World 2; hence Lewis’s analysis yields the correct result that had Gretta not cracked the egg, she would not have eaten it.