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While neural networks sprint through data, their architecture makes it difficult to trace the origin of errors that are obvious to humans -- like confusing a Converse high-top with an ankle boot -- limiting their use in more vital work like health care image analysis or research.

In the extreme foreground, a battered brown ankle boot, laces loosened, is reverently displayed on the table for our scrutiny, as if a holy relic placed on an altar.

Ms. Lee is often in jeans but today she is wearing a long royal blue Theory jacket and Christian Louboutin white ankle boot stilettoes that have “Love” scrawled on the side and silver spikes sprinkled on the toes.

Alternatively, they might have no idea who Sydney Howard Gay actually was and be thinking only about how much they can comfortably put on their Mastercard around the corner at Leffot, the home of the $775 Dearborn ankle boot.

Among them are a metallic leopard-print Capucines handbag as well as the women’s Star Trail Monogram ankle boot with patches.