@amici At the same time Marx's "laws of dialectical materialism" were mostly banal or vague or, as pointed out by Kołakowski, simply nonsense. Laws such as "everything in the world changes and is connected" are so vague that they cannot be either proven or disproven, yet for half century they were referred with quasi-religious care in serious policy and philosophical treaties. This annoyed Popper so much that the came up with the initial ideas on what we can actually call science.