Something being possible to do isn't enough evidence for rational people to believe that it happened. From my perspective, it's possible that you're Iron Mike Tyson, or that you died after your last comment and this one was posted by the assassin who killed you.
What? I never said it's evidence that it did happen, please don't make things up. I just pointed out the evidence provided to refute the claim is possibly invalid.
Because I'm not trying to prove that it did or not, but rather make parallels between that and OpenAI's name. For I care it could be an urban legend, but who cares that's not the point.