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

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

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

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.

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

Einstein's results again turned the tables and now very few philosophers or scientists still think that scientific knowledge is, or can be, proven knowledge.