There is no falsification before the emergence of a better theory.

Blind commitment to a theory is not an intellectual virtue: it is an intellectual crime.

Indeed, this epistemological theory of the relation between theory and experiment differs sharply from the epistemological theory of naive falsificationism.

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.

It would be wrong to assume that one must stay with a research programme until it has exhausted all its heuristic power, that one must not introduce a rival programme before everybody agrees that the point of degeneration has probably been reached.