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 Second Part Of The Transcendental Problem: How Is Pure Natural Science Possible? Specifically this bears upon the distinction between phenomena and noumena, that is things of sense or appearances, and beings of the understanding. Kant argues that we cannot have any determinate knowledge of the noumena, but we also can know that the phenomena are grounded upon the noumena 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 - amzn.to/49pc1Xm