The solution of an antinomy only depends on the possibility of showing that two apparently contradictory propositions do not contradict one another in fact, but that they may be consistent; although the explanation of the possibility of their concept may transcend our cognitive faculties. That this illusion is natural and unavoidable by human Reason, and also why it is so, and remains so, although it ceases to deceive after the analysis of the apparent contradiction, may be thus explained.
In the two contradictory judgements we take the concept, on which the universal validity of a judgement must be based, in the same sense; and yet we apply to it two opposite predicates. In the Thesis we mean that the judgement of taste is not based upon _determinate_ concepts; and in the Antithesis that the judgement of taste is based upon a concept, but an _indeterminate_ one (viz. of the supersensible substrate of phenomena). Between these two there is no contradiction.
We can do nothing more than remove this conflict between the claims and counter-claims of taste. It is absolutely impossible to give a definite objective principle of taste, in accordance with which its judgements could be derived, examined, and established; for then the judgement would not be one of taste at all. The subjective principle, viz. the indefinite Idea of the supersensible in us, can only be put forward as the sole key to the puzzle of this faculty whose sources are hidden from us: it can be made no further intelligible.
The proper concept of taste, that is of a merely reflective aesthetical Judgement, lies at the basis of the antinomy here exhibited and adjusted. Thus the two apparently contradictory principles are reconciled--_both can be true_; which is sufficient. If, on the other hand, we assume, as some do, _pleasantness_ as the determining ground of taste (on account of the singularity of the representation which lies at the basis of the judgement of taste), or, as others will have it, the principle of perfection (on account of the universality of the same), and settle the definition of taste accordingly; then there arises an antinomy which it is absolutely impossible to adjust except by showing that _both_ the contrary (though not contradictory) _propositions are false_. And this would prove that the concept on which they are based is self-contradictory. Hence we see that the removal of the antinomy of the aesthetical Judgement takes a course similar to that pursued by the Critique in the solution of the antinomies of pure theoretical Reason. And thus here, as also in the Critique of practical Reason, the antinomies force us against our will to look beyond the sensible and to seek in the supersensible the point of union for all our _a priori_ faculties; because no other expedient is left to make our Reason harmonious with itself.