What about the circumstance where earlier canonical information contradicts the Okudas' Chronology? The dates they give for the Genesis film trilogy are nonsense because they ignore the dialogue in Star Trek II that it's fifteen years since "Space Seed." Unless we're supposed to posit that Kirk and Khan met a few years after "Space Seed," but that doesn't make sense, either.Since the Okudas' Chronology was written by staffers of the actual TV shows, it has long been the policy of Paramount Licensing (now CBS Consumer Products) that tie-in material is expected to conform to the Chronology's assertions unless they are contradicted by later canonical information.