| subject by itself and QUA itself. | Aristotle was defining first | propositions as being essential | propositions; and he referred | universality to necessity and | extension to comprehension These | three criteria were much commented | upon during the whole scholastic | period, and were transformed, or | rather extended, by Ramus and others | in the sixteenth century. Whereas in | Aristotle they had expressed the | initial conditions of any conclusive | syllogism, in Ramus they became the | conditions of every systematic art: | within a system, methodically | organized for the exhibiting of | knowledge, any statement must be | taken in its full extension, it must | join things which are necessarily | related and it must be equivalent to | a definition. But these rules for | syllogistic or dialectic art in | Aristotle or Ramus become rules for | inductive invention in Bacon: and | their meaning is quite different. | With the rule of certainty and | liberty, Bacon aims at directiy | opposing the old logic, infected by | syllogistic or rhetoric formalism. | | By its title, the NOVUM ORGANUM makes | Bacon's ambition clear: to replace | the Aristotelian organon, which has | governed all knowledge until the end | of the sixteenth century with an | entirely new logical instrument, a | new method for the progress and