Is It Possible That I'm Not Standing Up?

There's a temporal element, right? So it's possible it could have been false. I mean, it might have been the case that it's not true right now from the past perspective. But once you get to the present, it's no longer it is possible that I'm not standing up because you know you're standing up. It's not possible that you're not standing up. And that's looking for knowledge that's a positional and a temporal,. which is fine.