Imre Lakatos

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

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

"For the sophisticated falsificationist a scientific theory T is falsified if and only if another theory T' has been proposed with the following characteristics :"

"Kuhn as does Popper rejects the idea that science grows by accumulation of eternal truths.. But while according to Popper science is ‘revolution in permanence’, and criticism the heart of the scientifi…"

"Where theory lags behind the facts, we are dealing with miserable degenerating research programmes."

"T' has excess empirical content over T: that is, it predicts novel facts, that is, facts improbable in the light of, or even forbidden, by T;"

"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 …"

"Our empirical criterion for a series of theories is that it should produce new facts. The idea of growth and the concept of empirical character are soldered into one."