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I saw a few of these black Anish Kapoor sculptures. The experience was worth the cost. The brain has a hard time processing it.

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Well, you've not actually seen the sculptures per se, only a missing area of the visual background, shaped like outline of the sculptures.

True! One can walk around and then observe some of the shape. They were behind glass. So no touching, which means there was some unresolved ambiguity.

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