Popper and Dawid's debate over 'non-empirical theory assessment' reveals that internal coherence and explanatory promise cannot substitute for empirical testability as confirmation.
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# Popper
Karl Popper was a highly influential 20th-century philosopher who changed how we think about science and knowledge. He argued that the best way to test scientific ideas is to try to prove them *wrong* rather than prove them right—if something can't be proven false, it's not really science. His ideas shaped modern scientific practice and remain central to how scientists evaluate theories today.
confirmation(Christensen 1999: 441; general epistemological usage)
The epistemic relationship in which current confidence in proposition E helps make rational one's current confidence in hypothesis H
internal coherence(Used by moral skeptics to argue that coherence provides no evidence of correspondence to external moral facts.)
The property of a set of beliefs being mutually consistent and mutually supporting within the set, without reference to anything outside the set.