"Far be it from me to suggest that geologists should be reckless in their drafts upon the bank of Time; but nothing whatever is gained, and very much is lost, by persistent niggardliness in this direction."

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There are geologists who can pick up a rock and say, 'Yes, there's oil under there.' A geologist who has been studying those kinds of rocks for 10 or 20 years is able to make that pronouncement.

— Christopher Alexander