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Theoretically we can't distinguish them. But then again, if CCTV shows a hooded guy exiting your shop's front door at 4 am, it would be safe to assume that the
by yongjik 8y ago
Theoretically we can't distinguish them. But then again, if CCTV shows a hooded guy exiting your shop's front door at 4 am, it would be safe to assume that the same guy entered the shop some time before that, even though theoretically it could be an alien lifeform teleported into your shop out of thin air.
It's never aliens. (Until we actually find them, of course.)
- darkerside 8y agoSeems more akin to saying, since we see this runner on the track, he must have been running around the track for an undeterminable period of the past time. It's just as possible that the runner just started running when you saw him. All I wanted to know is if we observed the past path or inferred it. Seems a valid question to me, but whatever.