The true method of knowledge is experiment.

 

The true method of knowledge is experiment.
--
All Religions are One (1788)

 

William Blake

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He fully knows His unchangeable essence, and has thus a knowledge of all that results from any of His acts. If we were to try to understand in what manner this is done, it would be the same as if we tried to be the same as God, and to make our knowledge identical with His knowledge. Those who seek the truth, and admit what is true, must believe that nothing is hidden from God; that everything is revealed to His knowledge, which is identical with His essence; that this kind of knowledge cannot be comprehended by us; for if we knew its method, we would possess that intellect by which such knowledge could be acquired. ...Note this well, for I think that this is an excellent idea, and leads to correct views; no error will be found in it; no dialectical argument; it does not lead to any absurd conclusion, nor to ascribing any defect to God. These sublime and profound themes admit of no proof whatever... In all questions that cannot be demonstrated, we must adopt the method which we have adopted in this question about God's Omniscience. Note it.

 

Maimonides

 

Argument is conclusive... but... it does not remove doubt, so that the mind may never rest in the sure knowledge of the truth, unless it finds it by the method of experiment. For if any man who never saw fire proved by satisfactory arguments that fire burns, his hearer's mind would never be satisfied, nor would he avoid the fire until he put his hand in it that he might learn by experiment what argument taught.

 

Roger Bacon

 

There cannot be a doubt that the method of inquiry which Mr. Darwin has adopted is not only rigorously in accordance with the canons of scientific logic, but that it is the only adequate method. Critics exclusively trained in classics or in mathematics, who have never determined a scientific fact in their lives by induction from experiment or observation, prate learnedly about Mr. Darwin's method, which is not inductive enough, not Baconian enough, forsooth, for them. But even if practical acquaintance with the process of scientific investigation is denied them, they may learn, by the perusal of Mr. Mill's admirable chapter "On the Deductive Method," that there are multitudes of scientific inquiries in which the method of pure induction helps the investigator but a very little way.

 

Charles Darwin

 

In science, conjecture drives both experiment and theory for it is only by forming conjectures (hypotheses) that we can make the direction of our experiments and theories informed. If such and such is true, then I should be able to do this experiment and look for this particular result or I should be able to find this theoretical formulation. Conversely, experiment and theory drive conjecture. One makes a startling observation or has a sudden insight and begins to speculate on its significance and implications and to draw possible conclusions (conjecture).

 

Robert Curl

 

Suppose you wanted to kill people. You would need to know ahead of time how to do it. That part is not too difficult. There are many ways. Some of them are better than others. Most of them have drawbacks. So you use what knowledge you've got, and you invent a new way. You think, and you think, and you think, and you come up with the perfect method. You pay a lot of attention to the setup. Because the perfect method is not an easy method, and careful preparation is very important. But that stuff is meat and potatoes to you. You have no problem with careful preparation. No problem at all. How could you, with your intelligence? After all your training? You know the big problems will come afterward. How do you make sure you get away with it? You use your knowledge. You know more than most people about how the cops work. You've seen them on duty many times, sometimes close-up. You know what they look for. So you don't leave anything for them to find. You go through it all in your head, very precisely and very exactly and very carefully. Just as carefully as you would mark the play card you knew for sure was going to win you a fortune.

 

Lee Child