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Is this a notable photograph for visual elicitation? I saw a cow immediately so I thought the references were some weird sarcastic humor...

(Not bragging about recognition by any means. Grew up in dairy country so I probably see too many cows in things overall!)

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Yes, it's famous. I remember seeing it as a child and taking ages to see the cow, and feeling a "hidden picture" sensation when it finally popped out. Now, decades later as an adult, it immediately and unambiguously looks like a cow. I wonder if that's due to 1) learning the picture, 2) learning more about cows, or 3) learning more about high-contrast images.

I do remember hearing that it's one of those things you can't ever "unsee".

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