"One way to determine if a view is inadequate is to check its consequences in particular cases, sometimes extreme ones, but if someone always decided what the result should be in any case by applying the given view itself, this would preclude discovering it did not correctly fit the case. Readers who hold they would plug in to the machine should notice whether their first impulse was not to do so, followed later by the thought that since only experiences could matter, the machine would be all right after all."

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An ordinary mirror is silvered at the back but the window of the night train has darkness behind the glass. My face and the faces of other travellers were now mirrored on this darkness in a succession of stillnesses. Consider this, said the darkness: any motion at any speed is a succession of stillnesses; any section through an action will show just such a plane of stillness as this dark window in which your seeking face is mirrored. And in each plane of stillness is the moment of clarity that makes you responsible for what you do.

— Russell Hoban