Realism, first affirmed by Plato, [552], [555]; problems of, as set out by Porphyry, and discussed before and after, [552]; scholastic formula of, [555]; objections, urged against, by Plato himself in Sophistes and Parmenides, [556] seq.; peculiarity in Plato’s doctrine of, [557]; impugned by Aristotle, [558] seq.; character of Aristotle’s objections to, [500]; counter-theory to, set up by Aristotle, [500], [501]; standard against, raised by Aristotle in his First Category, [502]; of Plotinus, [563]; of J. Scotus Erigena, [564]; of Remigius, [564].
Reciprocation, among Terms of Syllogism, [185].
Reduction, in Syllogism, [153]; object and process of, [164] seq.
[Reductio ad Impossibile] or Absurdum, used in proving modes of Second figure, [152]; nature of, [155], [160], [168]; a case of Reversal of Conclusion for refutation, [175]; abuse of, guarded against by the argument Non per Hoc, [179].
Regularity, principle of, in the Kosmos, see [Nature].
Relata, defined, [70].
[Relation], fourth Category, treated third, [65], [70]; admits, in some cases, contrariety and graduation, [71]; too narrowly conceived by Aristotle, [80]; covers all predicates, [82]; covers even Essence as Subject, [83]; an Universal comprehending and pervading all the Categories, rather than a Category itself, [84]; understood at the widest by some of the ancients, [84]; comprehensiveness of, conceded by Aristotle himself, [84], [88].
Relative-Opposita, should rather stand Opposite-Relativa, [104], [105].
Relativity, or Relation, see [Relation]; of knowledge, universal (in the sense of Protagoras), impugned by Aristotle, [430] seq., [589] seq.; allowed by Aristotle to pervade all mind, [493].
Remigius of Auxerre, went as far as Plato in Realism, [564].