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CONTENTS XVll 



Situations of deadlock 257 



The ramified chain of reasoning 258 



The totahty of what is tested 260 



The crucial experiment in practice 263 



Three Functional Criteria 264 



CORRELATIVE EFFICIENCY 264 



The insufficiency of the correlative index 266 



EXPLANATORY APPEAL 267 



The two criteria of immediate judgment 268 



HEURISTIC POWER 269 



Natural Selection of Scientific Theories 272 



Viability and validity 274 



THE LIFE CYCLE OF A SCIENTIFIC THEORY 276 



Infancy and youth 277 



Maturity 278 



Old age 279 



The death struggle 282 



Scientific Revolutions? 284 



The growth of order 286 



The correspondence principle 287 



NOT FALSIFICATION BUT SUBORDINATION 289 



The "problem" of dual description 292 



EVOLUTION AND ERROR 294 



Chapter V 



ORGANIZED SCIENCE 297 



The Invisible College 298 



COMMUNAL ADMINISTRATION, CONSENSUS, CULTURE 300 



THE NORMATIVE FITNCTIONS 302 



Protection 303 



Selection 305 



Appreciation 307 



THE CO-ORDINATION OF EFFORT 309 



