Hypothesis and imagination
There is a mask of theory over the whole face of nature.
If an educated layman were asked to set down his understanding of what goes on in the head when scientific discoveries are made and of what it is about a scientist that qualifies him to make them, his account of the matter might go something like this. A scientist is a man who has cultivated (i indeed he was not born with) the restless, analytical, problem-seeking, problem-solving temperament that marks his possession of a Scientific Mind. Science is an immensely prosperous and successful enterprise -- as religion is riot, nor economics (for example), nor philosophy itself -- because it is the outcome of applying a certain sure and powerful method of discovery and proof to the investigation of natural phenomena: The Scientific Method. The scientific method is not deductive in character -- it is a well-known fallacy to regard it as such -- but it is rigorous nevertheless, and logically conclusive. Scientific laws are inductive in origin. An episode of scientific discovery begins with the plain and unembroidered evidence of the senses -- with innocent, unprejudiced observation, the exercise of which is one of the scientist's most precious and distinctive faculties -- and a great mansion of natural law is slowly built upon it. Imagination kept within bounds may ornament a scientist's thought and intuition may bring it faster to its conclusions, but in a strictly formal sense neither is indispensable. Yet Newton was too severe upon hypoth