 Lewis (1997) points out that if Martin’s examples are to succeed as counterexamples to SCA then we must suppose that \(x\)’s dispositions are intimately related to its intrinsic properties. For consider again Martin’s example of an apparently dead wire attached to an electro-fink. Choi and Gundersen’s defence of SCA rests on the insistence that the wire is not dead but live. But we can imagine its intrinsic duplicate unconnected to an electro-fink, which is unquestionably dead. Choi and Gundersen’s defence therefore has the consequence that whether the wire is live or dead is an extrinsic matter. When Martin’s examples are supplemented with the assumption that dispositions involved in the examples are intrinsic to their bearers, therefore, this will preclude Choi and Gundersen’s defence of SCA. And so, Lewis, subscribing to the Intrinsic Dispositions Thesis (for short, IDT) that all dispositions are intrinsic to their bearers, concludes that Martin’s examples have left no hope for SCA. But is IDT true? We will discuss it later in  section 5.