Contradictions In Future Histories

Poul Anderson's Technic History is remarkably free of internal contradictions. We have found one or two. By contrast, James Blish's Cities In Flight was revised more than once in an unsuccessful attempt to remove its contradictions. I have just found one.

"The first Okie city Thor V ever saw had been an outfit which had dropped its city name and taken to calling itself the Interstellar Master Traders. By the time it had left Thor V again, it had earned itself another appellation: the Mad Dogs." (p. 246)

"'Most notorious of these recrudescences of imperialism was the reduction of Thor Five, the work of one of the earliest of the Okies, a heavily militarized city which had already earned itself the popular nickname of "the Mad Dogs." The epithet, current among Okies as well as planetary populations, of course referred primarily...'" (p. 440)

The speaker is interrupted but was about to give some other explanation of the "Mad Dogs" nickname.