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What do you see?
你看到了什么？
Or, what do you believe you see?
或者，你相信你看到了什么？
Do the lines on this grid look like they're curving?
这个网格上的线看起来是弯曲的是吧？
They're not. The lines of this grid are perfectly straight.
其实它们不是。这个网格上的线都是笔直的。
This illusion is the result of quirks in how your retina and cortical cells process black and white patterns,
这种错觉是你的视网膜和皮层细胞处理黑白图案的方式奇特的结果，
but more importantly, it demonstrates how once your brain believes something, it's hard to un-believe it.
但更重要的是，这证明了一旦你的大脑相信了一件事，就很难再去不相信。
