Full Idea
If horse-stages made sense at all, it would be easier to go from horses to horse-stages than to go from horse-stages to horses.
Gist of Idea
It is easier to go from horses to horse-stages than from horse-stages to horses
Source
David Wiggins (Sameness and Substance Renewed [2001], 6.9)
Book Reference
Wiggins,David: 'Sameness and Substance Renewed' [CUP 2001], p.178
A Reaction
A nice remark, analogous to 'it is easier to break a vase than to mend it'. Going from horse-stages to horses is the classic difficulty for 'bundle theories' (of objects, or persons): what is it that unites the bundle?