Maybe "discrepencies" wasn't the correct word. Sorry. English is not my native langage.
What I wanted to know was if each one proposed different versions and I didn't want to say that one was more right than the other, if it's how you understood my question. But you and Greg answered my question. Thanks.
And thanks to you Christopher I also learn that there are a lot of versions of different Star trek events. And I understand your explanation about Trek history and historical fiction.