But nature gives most of her evidence in answer to the questions we ask her. Here, as in the courts, the character of the evidence depends on the shape of the examination, and a good cross-examiner can do wonders. He will not indeed elicit falsehoods from an honest witness. But, in relation to the total truth in the witness’s mind, the structure of the examination is like a stencil. It determines how much of that total truth will appear and what pattern it will suggest.

-C.S. Lewis, The Discarded Image

[H/T Rebekah Valerius]