Full Idea
Cases of multiple realisability are typically cases in which some predicate ('is red', 'is in pain') applies to an object in virtue of that object's possession of any of a diverse range of properties.
Gist of Idea
Multiple realisability is actually one predicate applying to a diverse range of properties
Source
John Heil (From an Ontological Point of View [2003], 14.8)
Book Reference
Heil,John: 'From an Ontological Point of View' [OUP 2005], p.160
A Reaction
If the properties are diverse, why does one predicate apply to them? I take it that in the case of the pain, the predicate is ambiguous in applying to the behaviour or the phenomenal property. Same behaviour is possible with many qualia.