Even supposing you produce synthetical judgments (such as the law of Sufficient Reason, which you have never proved, as you ought to, from pure reason a priori, though we gladly concede its truth), you lapse when they come to be employed for your principal object, into such doubtful assertions, that in all ages one Metaphysics has contradicted another, either in its assertions, or their proofs, and thus has itself destroyed its own claim to lasting assent.
Ezagutza matematiko hutsaren esentzialkia eta hori beste edozein apriorizko ezagutzetatik bereizten duena da, ezagutza-modu horrek ez duela inola ere kontzeptuetatik sortu behar, eta bai beti kontzeptugintzaren bidetik bakarrik (Kritik 713.