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Popper's faith in Reason

I initially wrote the following in a private discussion forum a couple of years ago. I've removed the names and other things to respect privacy. I thought I had gotten Popper out of my system, but alas, I've been revisiting Popper's OSE lately which prompted me to repost this.   In the   Open Society and Its Enemies,   Popper introduces a section, Chapter 5, on Nature and Convention. (pg 55) Natural Laws vs Normative Laws Popper states that it is important to understand the distinction between (a)  natural laws , like the laws of physics, planetary motions, and (b)  Normative Laws , A law in sense (a)—a natural law —is describing a strict, unvarying regularity which either in fact holds in nature (in this case, the law is a true statement) or does not hold (in this case it is false). If we do not know whether a law of nature is true or false, and if we wish to draw attention to our uncertainty, we often call it an ‘hypothesis’. A law of nature is unalterable; there are no e
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Popper's "Knowledge without Authority"

  I posted this small summary in a Discord server I participate in. Copying it here, all the excerpts were taken from Karl Popper's "Knowledge Without Authority" 1960. Bold emphasis was added by me. --- Knowledge without Authority (1960) by Karl Popper is one of the most interesting and influential essays. In this lecture, Popper begins by criticizing Empiricism, but more importantly a criticism of "authorities" of knowledge. The problem of the validity of empiricism may be roughly put as follows: is observation the ultimate source of our knowledge of nature? And if not, what are the sources of our knowledge? ... The problem of the source of our knowledge has recently been restated as follows. If we make an assertion, we must justify it; but this means that we must be able to answer the following questions. 'How do you know? What are the sources of your assertion?’ This, the empiricist holds, amounts in its turn to the question, ‘ What observations (or m