Full Idea
McGinn assimilates the origin relation among organisms to the identity relation, so that the necessity of origin becomes a special case of the necessity of identity. We argue that this assimilation is illegitimate.
Gist of Idea
McGinn falsely claims necessity of origin is a special case of the necessity of identity
Source
comment on Colin McGinn (On the Necessity of Origin [1976]) by Graeme Forbes - The Metaphysics of Modality 6.1
Book Reference
Forbes,Graeme: 'The Metaphysics of Modality' [OUP 1985], p.134
A Reaction
Not sure about this. I have long suspected what McGinn suspects. Once you have identified the organism with a particular origin, it hardly seems surprising that this particular origin has become inescapable.