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Criterion: is no criterion of sense. The principle of falsification does not say that all other kinds of statements are cognitively pointless or empty. Even basic propositions can be criticized. Their assumption is not justified by our experiences.
Differentiation Criterion/Popper: it is going to be a proposal for a determination. Only a matter of decision. Can only be justified by analyzing its logical consequences: fertility, explanatory power, etc.
Principle of falsification = principle of differentiation.
Objektive Erkenntnis Hamburg 1993