Oh I agree it's not quite the same, but short of actual invisibility, there's no way of actually seeing who's right.
In your example, I don't see how you can cross reference a visual sense with an invisible object without the object somehow interacting with the environment and hence giving a marker for where it is. By making it a static test throughout, you don't need real-time visual information for your body sense to act on.
Blind people do quite well, don't they?
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Oooh, and that's a bad miss.
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