I contraposed parathesis against antithesis of Hegel dialectic.
Para of parathesis is para of parallel.
The relation of thesis and parathesis is not a relation to be made an appearance by contradiction or negation but "independent dual elements".
Anti and hetero are contextualized by "logical relation": contradiction and contrariety. On the other hand, para is a relation before logical opposition.
I suppose this relation to be "chirality": a relation of right hand and left hand.
An example of thesis and parathesis is a law of planet of Kepler and a law of fall of Galilei. They are neither contradiction nor contrariety. They are alienating logical thoughts until Newton unifies them in his head.