When they happen, scientific revolutions occur suddenly by a process that may not be completely quantifiable, a fact that partially accounts for the controversy and opposition often experienced in the historical period surrounding a given revolution ( Kuhn, Scientific Revolutions 89â90, 151â52, 159; cf. Barber 97â113; Poythress 461). Although certain criteria exist, based on the broader scientific communityâs shared paradigm, by which a scientific community can evaluate a candidate paradigm ( Achinstein 413; Kuhn, Essential Tension 321â22), these criteriaâs applications and their relative weights are insufficiently discreet to facilitate paradigm choice by simple proof alone ( Kuhn, Essential Tension 320, 329; cf. Carson 89â90; Kuhn, Scientific Revolutions 94, 152, 160â87; Kuhn, Since Structure 208â15). Thus, one might best describe paradigm change as a kind of âconversionâ ( Kuhn, Essential Tension 338; cf. Poythress 473), and different conversions may have different magnitudes. Indeed, even a conversion to the same paradigm may have different magnitudes for different, scientific sub-communities ( Kuhn, Scientific Revolutions 49â51, 92).
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