But are there any other explanations of who can reverse the spinning? We also asked viewers if they could perceive another common illusion, the "Magic Eye"?

但有的人能够倒转方向，有的不能，这又该有怎样的解释呢？为了了解事实真相，我们同时还让观察者观察另一张常见的错觉图，调查他们能否观察到“魔眼”？

youdao

The aim was to recreate the voice without the viewer being aware of any synchronisation - a bit like magic or an illusion.

BBC: Magazine

Teaching them that there has to be more money coming in than going out is critical, as is defeating the illusion that credit cards are magic pieces of plastic that allow you to get things for free.

FORBES: Should You Give Your 18-Year-Old a Credit Card?

The magic of the Paulson plan is that it creates the illusion that the mortgages have some value.

FORBES: Briefing Book: A. Michael Lipper