Sadler's Lectures

Sadler's Lectures

I'm that YouTube Philosophy Guy! Find more than 3,000 videos in my main channel. Support my video and podcast work! https://www.patreon.com/sadler or https://www.buymeacoffee.com/A4quYdWoM Learn more about this podcast channel - https://youtu.be/qRvL0gqlyrw and https://gregorybsadler.substack.com/p/the-sadlers-lectures-podcast Due to popular demand - and with the work underwritten by my Patreon supporters - I have been converting my videos into MP3 files listeners can listen to anywhere they want! I have a second podcast, Mind & Desire, publishing original episodes on a variety of topics in philosophy, which you can find here - https://gregorybsadler.substack.com/podcast

Episodes

David Hume, Treatise of Human Nature - The Self As Bundle Of Perceptions - Sadler's Lectures

June 22, 2026 • 12 mins
This lecture discusses key ideas from the 18th century philosopher, essayist, and historian, David Hume's work A Treatise of Human Nature Specifically it examines his argument that there is no such thing as a human self in a metaphysical sense of a substance or soul that remains the same throughout changes. Instead, what we have or are is a bundle or collection of perceptions in the mind. While we can form an idea of the self, thi...
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Thomas Nagel, What Is It Like To Be A Bat? - Nagel's Speculative Proposal

June 21, 2026 • 12 mins
This lecture discusses the 20th century Analytic philosopher, Thomas Nagel's essay "What Is It Like To Be A Bat", and focuses upon the "speculative proposal" Nagel ends the article with, namely that of developing a more objective "phenomenology" which would perhaps allow greater clarity and precision to be given to descriptions of the experiences of "what it is like to be a . . . " To support my ongoing work, go to my Patreon site...
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Thomas Nagel, What Is It Like To Be A Bat? - Deceptive Clarity In Identification - Sadler's Lectures

June 20, 2026 • 14 mins
This lecture discusses the 20th century Analytic philosopher, Thomas Nagel's essay "What Is It Like To Be A Bat", and focuses upon one of the key points Nagel makes in his criticisms of reductionist projects aimed at explaining mind entirely in physical terms, namely that in order to make the deceptively clear "is" or "are" involved in those putative identifications make sense, what is required is some sort of coherent and robust t...
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Thomas Nagel, What Is It Like To Be A Bat? - Objective Understanding And Experience

June 19, 2026 • 15 mins
This lecture discusses the 20th century Analytic philosopher, Thomas Nagel's essay "What Is It Like To Be A Bat", and focuses upon Nagel's analysis of one way that a person who acknowledges that we cannot imagine or conceptualize the subjective experience of a bat might try to get around that, by appealing to more objective concepts and facts about the organs, body, and brain of the bat. He notes that this doesn't yield us the subj...
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Thomas Nagel, What Is It Like To Be A Bat? - Subjective Experiences Of Other Species

June 16, 2026 • 13 mins
This lecture discusses the 20th century Analytic philosopher, Thomas Nagel's essay "What Is It Like To Be A Bat", and focuses upon he portion of his article in which he begins to explore what subjective experience of other species would be and whether we have the capacity to imagine or understand what it is like to be to be that animal. He selects bats in particular since they are mammals but have a very different sensorium from us...
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Thomas Nagel, What Is It Like To Be A Bat? - Reductionist Accounts And Conscious Experience

June 15, 2026 • 11 mins
This lecture discusses the 20th century Analytic philosopher, Thomas Nagel's essay "What Is It Like To Be A Bat", and focuses upon the first part of the article, in which Nagel raises a number of general problems for adopting a physicalist reductionist analysis of mind to resolve the mind-body problem by explaining conscious experience in terms of something non-mental, e.g. the brain. To support my ongoing work, go to my Patreon s...
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Thomas Hobbes, De Corpore - "Of Identity And Difference" - Sadler's Lectures

June 12, 2026 • 10 mins
This lecture discusses key ideas from the modern philosopher Thomas Hobbes' work De Corpore, specifically ch 11. "Of Identity and Difference", part 7 In this section, Hobbes explores questions and problems of what makes a thing remain the same thing throughout its changes over time or in composition. He considers several different philosophical approaches to the issue, one which focuses on the matter, another which focuses on the...
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Stanislaw Lem, Summa Technologiae - Defrosting And Duplicating - Sadler's Lectures

June 10, 2026 • 10 mins
This video focuses on chapter 6 of Stanislaw Lem's Summa Technologiae, specifically the section “Personality and Information”, which discusses thought experiments that bear on turning a person into information and reconstituting that person somewhere else or at a different point in time. Specifically it examines on a somewhat different kind of thought-experiment, involving freezing a person, taking all of their atoms...
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Stanislaw Lem, Summa Technologiae - Killing the Telegraphed Person - Sadler's Lectures

June 9, 2026 • 13 mins
This video focuses on chapter 6 of Stanislaw Lem's Summa Technologiae, specifically the section “Personality and Information”, which discusses thought experiments that bear on turning a person into information and reconstituting that person somewhere else or at a different point in time. Specifically it examines one feature of these types of situations that is morally problematic, namely that it seems like the process...
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Stanislaw Lem, Summa Technologiae - Paradoxes Of Telegraphing Persons - Sadler's Lectures

June 7, 2026 • 12 mins
This video focuses on chapter 6 of Stanislaw Lem's Summa Technologiae, specifically the section “Personality and Information”, which discusses thought experiments that bear on turning a person into information and reconstituting that person somewhere else or at a different point in time. Specifically it examines the paradoxes and problems that arise when we start thinking through the implications of telegraphing (or i...
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William Clifford, The Ethics Of Belief - The Limits Of Inference - Sadler's Lectures

June 4, 2026 • 14 mins
This lecture discusses the William Clifford's 1877 essay "The Ethics Of Belief", in which he makes and argued for the central claim "it is wrong always, everywhere, and for any one, to believe anything upon insufficient evidence." It focuses on the third section of his essay, titled "The Limits Of Inference" in which Clifford discusses conditions for having well-founded beliefs of matters we don't have direct experience of, for...
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William Clifford, The Ethics Of Belief - Beliefs and Traditions - Sadler's Lectures

May 30, 2026 • 14 mins
This lecture discusses the William Clifford's 1877 essay "The Ethics Of Belief", in which he makes and argued for the central claim "it is wrong always, everywhere, and for any one, to believe anything upon insufficient evidence." It focuses on portion of part 2 of the essay that is devoted to Clifford's analysis of tradition. He distinguishes between particular traditions, developing within a specific group, culture, or civiliz...
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William Clifford, The Ethics Of Belief - Veracity, Knowledge, and Judgement - Sadler's Lectures

May 28, 2026 • 15 mins
This lecture discusses the William Clifford's 1877 essay "The Ethics Of Belief", in which he makes and argued for the central claim "it is wrong always, everywhere, and for any one, to believe anything upon insufficient evidence." It focuses on Clifford's criteria for determining when and whether we ought to give credence to the testimony of other people, especially those who have made assertions we cannot directly verify. He id...
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William Clifford, The Ethics Of Belief - Individuals' Beliefs, Society, And Humanity

May 26, 2026 • 14 mins
This lecture discusses the William Clifford's 1877 essay "The Ethics Of Belief", in which he makes and argued for the central claim "it is wrong always, everywhere, and for any one, to believe anything upon insufficient evidence." It focuses on Clifford's contention that the beliefs people hold, even if they seem to be quite trivial, can have significant importance and consequences. His argument is that we inevitably draw upon ...
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William Clifford, The Ethics Of Belief - Belief, Action, and Duty Of Inquiry - Sadler's Lectures

May 25, 2026 • 14 mins
This lecture discusses the William Clifford's 1877 essay "The Ethics Of Belief", in which he makes and argued for the central claim "it is wrong always, everywhere, and for any one, to believe anything upon insufficient evidence." It focuses on the two cases that Clifford's essay uses to illustrate the ethical duty he argues that we have not to believe anything without having gathered and weighed evidence for or against the beli...
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Seneca, Letter 90 - Philosophy, Technology, And Wisdom - Sadler's Lectures

May 23, 2026 • 20 mins
This lecture discusses key ideas from the ancient Stoic philosopher Seneca's Letters, this one looking at Letter 90 It focuses specifically on Seneca's engagement with another earlier Stoic philosopher, Posidonius, who developed theories about the development of human disciplines and technology (artes), having to do with wisdom and philosophy. Posidonius postulates a golden age in which human beings lived in accordance with natur...
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William Gass, The Case Of The Obliging Stranger - Moral Philosophers & Principles

May 22, 2026 • 12 mins
This lecture discusses key ideas from the 20th century philosopher and novelist William Gass' article "The Case Of The Obliging Stranger", which begins with a case that runs: "Imagine I approach a stranger on the street and say to him, "If you please, sir, I desire to perform an experiment with your aid." The stranger is obliging, and I lead him away. In a dark place conveniently by, I strike his head with the broad of an axe and c...
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William Gass, The Case Of The Obliging Stranger - Clear Cases And Unclear Cases - Sadler's Lectures

May 20, 2026 • 15 mins
This lecture discusses key ideas from the 20th century philosopher and novelist William Gass' article "The Case Of The Obliging Stranger", which begins with a case that runs: "Imagine I approach a stranger on the street and say to him, "If you please, sir, I desire to perform an experiment with your aid." The stranger is obliging, and I lead him away. In a dark place conveniently by, I strike his head with the broad of an axe and c...
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William Gass, The Case Of The Obliging Stranger - The Case and Moral Theories - Sadler's Lectures

May 19, 2026 • 15 mins
This lecture discusses key ideas from the 20th century philosopher and novelist William Gass' article "The Case Of The Obliging Stranger", which begins with a case that runs: "Imagine I approach a stranger on the street and say to him, "If you please, sir, I desire to perform an experiment with your aid." The stranger is obliging, and I lead him away. In a dark place conveniently by, I strike his head with the broad of an axe and c...
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Aristotle, On Interpretation - Contraries Of Affirmative Propositions - Sadler's Lectures

May 17, 2026 • 11 mins
This lecture discusses the ancient Greek philosopher Aristotle' work, On Interpretation, focusing on his discussion near the end of the work bearing on what the contraries of affirmative, generally universal, proposition, actually are, since this is an issue that people often get confused over. Aristotle will resolve this partly by considering in propositions what is the case by essence (kath'heato), or accidentally (kata sumbebēko...
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