I just find it strange that Vulcans do not know what a Romulan looks like. I mean presumably Romulans are a distant offshoot of the Vulcan species and just based on that fact, they already could share common traits even after so many years isolated and left to evolve on their own. Could it be Spock and other Vulcans just forgot over time what they look like? Because I don't buy this whole having no clue whatsoever story.