Karl Popper argued that positivist sociology generally failed to be as scientific as it intended to be because it used inductive reasoning rather than deductive reasoning. While inductive reasoning requires a researcher to look for evidence that supports their hypothesis, true scientific method attempts to falsify the hypothesis. Instead of searching for supportive evidence, the researcher should try and prove that their hypothesis is untrue. If they are unable to do so, it remains the best explanation. Popper was particularly critical of some concepts within Marxism, such as false class consciousness arguing that it is not really possible to falsify. See falsification