According to Leszek Kołakowski, the laws of dialectics at the very base of Marxism are fundamentally flawed: some are "truisms with no specific Marxist content", others "philosophical dogmas that cannot be proved by scientific means", yet others just "nonsense". Some Marxist "laws" are vague and can be interpreted differently, but these interpretations generally fall into one of the aforementioned categories of flaws as well. However, Ralph Miliband countered that Kolakowski had a flawed understanding of Marxism and its relation to Leninism and Stalinism.