Logic is the last scientific ingredient of Philosophy; its extraction leaves behind only a confusion of non-scientific, pseudo problems.
Rudolf CarnapLet us be cautious in making assertions and critical in examining them, but tolerant in permitting linguistic forms.
Rudolf CarnapScience is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements.
Rudolf Carnap