Confronted by a given piece of property or resource, A will be apt to claim that it is justly his because he owns it—he acquired it legitimately, he earned it; B will be apt to claim that it justly ought to be someone else’s, because they need it much more, and if they do not have it, their basic needs will not be met. But our pluralist culture possesses no method of weighing, no rational criterion for deciding between claims based on legitimate entitlement against claims based on need. Thus these two types of claim are indeed, as I suggested, incommensurable, and the metaphor of ‘weighing’
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