opposition, square

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opposition, square of

Geometrical representation of the traditional logical relations of opposition (contradictories, contraries, subalterns) among the four types of propositions (universal affirmative or A-proposition, universal negative or E, particular affirmative or I, particular negative or O) in the Aristotelian doctrine of the syllogism. At the top left is the A; at the top right is the E; below the A is the I; and below the E is the O. The A and the O, like the E and I, are contradictories (diagonal relations); the A and the E are contraries; and the I is subaltern to (hence implied by) the A, the O subaltern to the E. Whereas contradictories have opposite truth-values (one true, the other false), contraries cannot both be true but can both be false.

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No references found			Oppolzer, Theodor Von opponent Opponent Games opponent-colors theory Opportunism Opportunistic infections opportunistic microorganism opportunistic species Opportunity opportunity cost Opportunity Management System opportunity school opposable opposed engine opposed-blade damper opposing wind Opposite opposite rays opposite side opposite tide opposite vertices oppositely congruent figures Opposition Opposition Between City and Countryside Opposition Between Mental and Physical Labor opposition, square Oprichnina Oprishki OPROM Ops OPS5 OPS83 OPSEC opsonic action opsonic index Opsonin opsonize Opsware opt-in opt-out optative Opteron Opti-Jack optic Optic Analyzer optic angle optic apraxia optic axis optic canal optic capsule optic chiasma			oppositely oppositely Oppositely Charged Twin Monopole oppositely congruent figures oppositeness oppositeness oppositeness oppositeness Opposites Opposites Opposites Opposites Oppositifolious opposition opposition opposition opposition opposition opposition Opposition (parliamentary) Opposition benches Opposition Between City and Countryside Opposition Between Mental and Physical Labor Opposition Front Bench Opposition parties Opposition Personal Funds Amount opposition to allegations Opposition to the Kyoto Protocol Opposition to the Kyoto Protocol Opposition to the Vietnam War opposition, square oppositional oppositional oppositional oppositional Oppositional defiance disorder Oppositional defiant disorder Oppositional defiant disorder Oppositional defiant disorder Oppositional defiant disorder Oppositional defiant disorder Oppositional Defiant Disorder or Conduct Disorder oppositional disorder Oppositional-defiant disorder oppositionist oppositionist Oppositions Oppositions Oppositions Oppositions Oppositipetalous Oppositisepalous oppositive oppositive Oppostional Disorder Opposum shrimp opposure OPPP OPPPI OPPPM OPPPS

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