So far as laws of mathematics refer to reality, they are not certain. And so far as they are certain, they do not refer to reality (Albert Einstein, 1922) All traditional logic habitually assumes that precise symbols are being employed. It is therefore not applicable to this terrestrial life but only to an imagined celestial existence [....] logic takes us nearer to heaven than most other studies" (Russell, 1923, p. 88-9). All economists know the economy is complex-very complex. That is one of the reasons why society needs economiststo try to make that complexity somewhat simpler and more understandable (Colander, 2000: 1). Contents 1. Introduction 2. Complexity 3. Vagueness 4. Intrinsic complexity and intrinsic vagueness in the capability approach 5.
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