Contemporary Physics and the Little Leeway Thesis
Further support for the Little Leeway Thesis , this time from French and McKenzie's 2012 paper, "Thinking Outside the Toolbox" : "It is indisputably essential to Lewis’ reductive ambitions in general that all the perfectly natural properties are intrinsic, for otherwise they cannot be subject to the ‘principle of free recombination’ that lies at the heart of his modal system. Furthermore, the inclusion of the predicate of ‘perfectly natural’ as an ideological primitive is motivated by the theoretical benefits of doing so; since it is the suitability of these properties to analyze duplication that grounds the majority of these benefits, and since their ability to analyze duplication requires that they be intrinsic, unless these properties are intrinsic then the motivation for including this primitive is seriously undercut. Now, for Lewis (as for others) a property is intrinsic only if it could be had by a lone object (which of course is to say in the Lewisian framewor...