Continuing on The Philosophy of Nature: A Guide to the New Essentialism.

Ellis' essentialism about physics and chemistry says that, for example, atoms of various elements are truly and unambiguously different and behave in ways that make them what they are. What does this entail?

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The incredible post-Seinfeld improvised sit-com Curb Your Enthusiasm has had its finale, and so Mark, Lawrence, Sarah and Al reflect on its format, its characters, its way of exploring puzzles of modern manners, its treatment of race and gender, and more. Was it too repetitive? Did it get too contrived?

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Your four hosts plus book editor Chris Sunami reflect on doing the podcast for 15 years and making the new book, which you should order on April 25.

Plus, the three rules, future ambitions, and more.

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Learn more about the book at partiallyexaminedlife.com/book.