There are some real grounds for sur

There are some real grounds for surprise at the state in which book one has come down to us, and the wording of I.23.6 suggests to me that the famous sentence which expounds the alethestate prophasis is (as Schwartz thought) a later addition to a text on the whole composed early. The explanation is, no doubt, that Thucydides' thought about these matters developed and altered, but one can imagine changes less drastic and dramatic than that which Schwartz proposed, changes involving a less than total break between the early and the late Thucydides.