We have the duty of formulating, of summarizing, and of communicating our conclusions, in intelligible form, in recognition of the right of other free minds to utilize them in making their own decisions.

Inductive inference is the only process known to us by which essentially new knowledge comes into the world.

In scientific subjects, the natural remedy for dogmatism has been found in research.

The best causes tend to attract to their support the worst arguments, which seems to be equally true in the intellectual and in the moral sense.

Although no explanation can be expected to be satisfactory, it remains a possibility among others that Mendel was deceived by some assistant who knew too well what was expected. This possibility is supported by independent evidence that the data of most, if not all, of the experiments have been falsified so as to agree closely with Mendel's expectations.

If ... we choose a group of social phenomena with no antecedent knowledge of the causation or absence of causation among them, then the calculation of correlation coefficients, total or partial, will not advance us a step toward evaluating the importance of the causes at work.

The best time to plan an experiment is after you've done it.