Relatedly,
A lecture by Chris Isham, whose topos is discussed a bit in Smolin's book 'Three roads to quantum gravity', lectures on results <https://www.youtube.com/watch?v=VCOHFFEsl0c> from his paper on Toposes <https://arxiv.org/pdf/0803.0417.pdf>, Heidegger, and the foundations of physics.
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