Page "belles_lettres" Paragraph 399

Ideas need to be tested, and not merely by argument and debate.

When some question arises in the medical field concerning cancer, for instance, we do not turn to free and open discussion as in a political campaign.

We have recourse to the scientifically-trained specialist in the laboratory.

The merits of the Salk anti-polio vaccine were not established on the forensic platform or in newspaper editorials, but in the laboratory and by tests in the field on thousands of children.