 In addition to failing to give an account of the standard notion of intrinsicality, there are reasons to think that Langton and Lewis cannot be as neutral as they claim with respect to what account of naturalness is combined with their account. As noted above, Langton and Lewis claim that their account of intrinsicality is compatible with any construal of naturalness on which the natural properties are those that play a special role in our thinking. On one such conception of naturalness, the natural properties include those properties for which we have simple words or concepts, which do not strike us as strange or odd, and on which we have relied in past inductions (Sider 2001: 362). Given this conception of naturalness, the property of being a rock is a natural property, and hence is classified as intrinsic on the Langton and Lewis account. However, as Sider 2001 argues, being a rock is plausibly not an intrinsic property. Just as an object that is qualitatively intrinsically the same as a house and is a large part of a house is not itself a house, an object that is qualitatively intrinsically the same as a rock and is a large part of a rock is not itself a rock. Hence, whether something is a rock is partly a matter of what is the case outside of it. Hence, contra the combination of the Langton and Lewis account with the above conception of naturalness, being a rock is not intrinsic. 