If any one thinks himself offended, he is at liberty to refute my charge by producing a single synthetical proposition belonging to metaphysics, which he would prove dogmatically a priori, for until he has actually performed this feat, I shall not grant that he has truly advanced the science;
Esan hori dela-eta inor mindu baldin bada, aise asko desegin dezake berak akusazioa; nahikoa du horretarako Metafisikako proposizio sintetiko bakar bat aurkeztea, eta hura modu dogmatikoan a priori demostratzeko bere burua eskaintzea;