This lecture discusses key ideas from the 18th century philosopher Immanuel Kant's work, The Prolegomena to Any Future Metaphysics. Specifically it focuses on his discussion in the Preamble on the peculiarities of all metaphysical knowledge, bearing upon the nature of properly metaphysical judgements, cognitions, or propositions, namely that they are all synthetic a priori. This is what allows there to be any genuine advance in knowledge through metaphysics To support my ongoing work, go to my Patreon site - www.patreon.com/sadler If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM You can find over 3,000 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler Purchase Kant's Prolegomena to Any Future Metaphysics - https://amzn.to/49pc1Xm