The Borg were encountered in the past by Lily in First Contact and later by Archer and crew in Enterprise. How come the Federation never knew about the Borg prior to Picard's encounter? Wouldn't have Cochrane and/or Lily made such a significant recording of this? What about Archer and Crew.
And not only that, but when the Vulcans made First Contact, most of the Earth was still assimilated, right? Unless I'm not remembering correctly and there was another point in the movie Picard & crew time traveled, the Vulcans would have obviously seen (scanned) this and they would have known about the Borg as well. Not only that, but as a bonus the Vulcans probably wouldn't have even made First Contact if they'd seen a world overrun by Borg or even dead Borg after the Queen's death.
Also, if the Borg just all dropped dead on Earth after the Queen's death, there would be so much physical evidence confirming their existence. I highly doubt Section 31 could cover all that up if at some point we could assume that's why we didn't know about them.
And not only that, but when the Vulcans made First Contact, most of the Earth was still assimilated, right? Unless I'm not remembering correctly and there was another point in the movie Picard & crew time traveled, the Vulcans would have obviously seen (scanned) this and they would have known about the Borg as well. Not only that, but as a bonus the Vulcans probably wouldn't have even made First Contact if they'd seen a world overrun by Borg or even dead Borg after the Queen's death.
Also, if the Borg just all dropped dead on Earth after the Queen's death, there would be so much physical evidence confirming their existence. I highly doubt Section 31 could cover all that up if at some point we could assume that's why we didn't know about them.