Full Idea
A borderline red-orange object satisfies the disjunctive predicate 'red or orange', even though it satisfies neither 'red' or 'orange'. When applied to adjacent bands of colour, the disjunction 'sweeps up' objects which are reddish-orange.
Gist of Idea
An object that is not clearly red or orange can still be red-or-orange, which sweeps up problem cases
Source
Ian Rumfitt (The Boundary Stones of Thought [2015], 8.5)
Book Reference
Rumfitt,Ian: 'The Boundary Stones of Thought' [OUP 2015], p.47
A Reaction
Rumfitt offers a formal principle in support of this. There may be a problem with 'adjacent'. Different colour systems will place different colours adjacent to red. In other examples the idea of 'adjacent' may make no sense. Rumfitt knows this!