The question Would Portal-style portals transmit gravity? was recently migrated from scifi.SE. Some people think it's off topic, some people don't, and I can kind of see both sides so I'm not quite sure what to do with it. On one hand, portals aren't real, and we can't meaningfully apply actual physics to a situation that can't arise. On the other hand, the physics of Portal is very close to being real, enough so that we could perhaps offer useful insights as to how it could work; plus, it's not unprecedented for answers to make a "best guess" explanation for things seen in science fiction (the example that comes to mind is this one, because I posted it, though I believe there are others).
So, do we close it?