Page:Thoughts on art and life.djvu/177

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THOUGHTS ON SCIENCE

HERE is no human experience that can be termed true science unless it can be mathematically demonstrated. And if thou sayest that the sciences which begin and end in the mind are true, this cannot be conceded, but must be denied for many reasons, and firstly because in such mental discourses experience is eliminated, and without experience there can be no certainty.

2.

You must first propound the theory and then explain the practice

3. Let no man who is not a mathematician read the principles of my work.

4. In the course of scientific exposition the demonstration of a general rule derived from a previous conclusion is not to be censured.

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