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In all our studies of the brain, no mechanism has been discovered that can force the mind to think, or the individual to believe, anything. The mind continues free. That is a statement I have long considered.

在我们对大脑的所有研究中，还没有发现任何机制可以强迫大脑思考，或个人相信任何事情。思想继续自由。这是我长期以来一直在考虑的一种说法。

— Wilder Penfield 怀尔德·彭菲尔德