The proving power of the intellect or the senses was questioned by the skeptics more than two thousand years ago; but they were browbeaten into confusion by the glory of Newtonian physics.

Philosophy of science without history of science is empty; history of science without philosophy of science is blind.

Research programmes, besides their negative heuristic, are also characterized by their positive heuristic.

The classical example of a successful research programme is Newton's gravitational theory: possibly the most successful research programme ever.

If even in science there is no a way of judging a theory but by assessing the number, faith and vocal energy of its supporters, then this must be even more so in the social sciences: truth lies in power.

The proving power of the intellect or the senses was questioned by the skeptics more than two thousand years ago; but they were browbeaten into confusion by the glory of Newtonian physics.

Intellectual honesty consists in stating the precise conditions under which one will give up one's belief.