The question that never gets answered by conspiracy theorists:
If Oswald wasn't in Mexico City, then where was he?
He's missing from Sept 25th to Oct 3rd, with zero sightings of him anywhere in-between (except of course inconveniently on the bus to Mexico City and at the Cuban and Soviet consulates there).
Good question.
For those interested in discussing this event and in trying to figure out what happened (as best as we can) - specifically about whether he went to Mexico City - it's the type of question they would welcome.
When people discuss historic events, whether controversial ones like the assassination or others, they look at the event from all sort of angles and perspectives. As in: if we're not sure about what did happen we ask about alternative explanations for what did. Then we weigh them, consider what is more or less likely.
But you'll see that the posters who say they're "undecided" on this - they're not a lone assassin adherent or, they claim, a conspiracy believer - will dismiss these types of questions. If they're not being simple-minded Oswald defenders I'm not sure why they do this.
So we have evidence he went to Mexico City. What evidence do we have that he was elsewhere over this period? What is the alternative explanation for him having, for example, the Cuban secretary's (Silvia Duran's) phone number in his address book?