In our fourth ep on Chapter 10 in C&R, we wrestle with Popper's treatment of verisimilutude, both the formal and informal versions. Did the project fail? Was Popper out of his mind? Does this invalidate everything?

• Murders with ball-peen hammers
• Walking the line between verification and falsification
• Is science only after truth?
• Verisimilutude and its formalization
• Why the formalization fails
• Popper's three requirements for the growth of knowledge
• Popper's ratchet and the no ad-hoc rule

Like many other philosophers I am at times inclined to classify philosophers as belonging to two main groups—those with whom I disagree, and those who agree with me.
- C&R, page 309

I shall give here a somewhat unsystematic list of six types of cases in which we should be inclined to say of a theory t1 that it is superseded by t2 in the sense that t2 seems—as far as we know—to correspond better to the facts than t1 , in some sense or other.

• t2 makes more precise assertions than t1 , and these more precise assertions stand up to more precise tests.
• t2 takes account of, and explains, more facts than t1 (which will include for example the above case that, other things being equal, t2 ’s assertions are more precise).
• t2 describes, or explains, the facts in more detail than t1 .
• t2 has passed tests which t 1 has failed to pass.
• t2 has suggested new experimental tests, not considered before t 2 was designed (and not suggested by t1 , and perhaps not even applicable to t1 ); and t 2 has passed these tests.
• t2 has unified or connected various hitherto unrelated problems.

- C&R, page 315

Let me first say that I do not suggest that the explicit introduction of the idea of verisimilitude will lead to any changes in the theory of method. On the contrary, I think that my theory of testability or corroboration by empirical tests is the proper methodological counterpart to this new metalogical idea. The only improvement is one of clarification.
- C&R, page 318

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Check out more from Brett Hall here and Peter Boghossian here.

• What is the relationship between confidence and evidence?
• The "formal apparatus of science" vs the "sociology" of science
• Eddington's famous experiment
• Why confidence and belief can't be mathematized (But why they are useful nonetheless)
• Confidence as a function of falsifying experiments
• Bayesianism vs critical rationalism
  

• Paper discussing how it took the wider scientific community over 40 years (after Eddington's experiment!) to become convinced in the truth of general relativity: The 1919 measurement of the deflection of light
• Eddington's original paper:
• Vaden and Brett's blog exchange

• Follow us on Twitter at @IncrementsPod, @BennyChugg, @VadenMasrani
• Come join our discord server! DM us on twitter or send us an email to get a supersecret link
• Become a patreon subscriber here. Or give us one-time cash donations to help cover our lack of cash donations here.
• Click dem like buttons on youtube

Where were you last night, and why do you have condoms in your pocket? Tell us at incrementspodcast@gmail.com.

Support Increments