Saul Dushman Quote

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the state of Science, whatever the matter may be.

Fundamentals of atomic physics (1951), preface

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot...

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot...

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot...

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot...