Note 391 — SCIENTIFIC DISCOVERY AND LOGICAL PROOF
Reading edition
It may be suggested that there is a similar confusion on this question: when history is called a science, it is often forgotten that its data are essentially such that they can only occur once, while the material of the other sciences is such that cases of ‘the same’ may always be found in it. But neither need it be denied on this account that history can, and should, be written in a scientific spirit.