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It's got to be because optical mirrors are relatively easy to produce and field, and it's obvious that it presents a duplicate. I would be interested in designs for a 'sound mirror' that doesn't just look like a wall under echolocation. Maybe a system to dynamically reproduce a 'sound hologram' of the bat? A 'scent mirror' would be really difficult to ...


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Here are my thoughts. An animal does not chose to emit some light while they have more control over other signals they emit and may likely just not emit it. So it would not be an easy trait to study. More importantly, animals (almost) always receive feedback for signals they emit. When a dog barks, it can hear itself! Animals are not used to receive ...


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The mirror test is definitely useful, but clearly biased toward animals with social intelligence (a notion of self is only useful if there's a notion of other) and also toward highly visual animals. A mole-rat, no matter how intelligent, is unlikely to use a mirror for much of anything. Using the same test for animals with very different sensory modalities ...



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