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Def Positivism / Hacking: 1 Verification - 2 observation - 3 VsCausality - 4 VsExplanation (just brings phenomena in an order that does not explain why) - 5 VsTheoretical Entities - 6 (Leave nothing that is not verifiable) VsMetaphysics
PopperVs label "positivist" - VsSense Data - not V Metaphysics - non-verifiable sentences are acceptable as a first step - later refuted.
Empiricism: measuring (theoretical entities exist) - positivism: seeing feeling smelling hearing tasting (theoretical entities do not exist).
Einführung in die Philosophie der Naturwissenschaften Stuttgart 1996