Francis Crick Quotes
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Intelligent thinking means an increment of freedom in action - an emancipation from chance and fatality. "Thought" represents the suggestion of a way of response that is different from that which would have been followed if intelligent observation had not effected an inference as to the future.
Theorists will often complain that experimentalists ignore their work. Let a theorist produce just one theory of the type sketched above (i.e., one that makes nonobvious verified predictions) and the world will jump to the conclusion (not always true) that he has a special insight into difficult problems.
To produce a really good biological theory one must try to see through the clutter produced by evolution to the basic mechanisms lying beneath them, realizing that they are likely to be overlaid by other, secondary mechanisms. What seems to physicists to be a hopelessly complicated process may have been what nature found simplest, because nature could only build on what was already there.