Ya, and I get that there are other forms of intelligent life. I more meant if we are dealing with one that can develop an advanced enough society to have transporters, we aren't talking about porpoises.
So if we assume having opposable thumbs, living on land, probably walking upright etc, we'd see some evidence before or after, of a possibility of that somewhere on the tree. We can trace the origins of humans back to mammals alive at the time of the dinosaurs, so where would this other advanced species fit in?
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