This lecture discusses key ideas from the modern empiricist philosopher David Hume' Enquiry Concerning Human UnderstandingIt focuses specifically on his discussion of skepticism, specifically in terms of the reliability of the senses and the truth of what we perceive through them. He considers in particular whether the distinction between primary and secondary qualities really holds or not.To support my ongoing work, go to my Patreon site - www.patreon.com/sadlerIf you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoMYou can find over 2000 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadlerPurchase Hume's Enquiry - amzn.to/3by4R6n