Full Idea
There is a dispute over whether a property's dispositionality is built into the property or whether it is a contingent add-on.
Gist of Idea
Are a property's dispositions built in, or contingently added?
Source
John Heil (From an Ontological Point of View [2003], 09.4)
Book Reference
Heil,John: 'From an Ontological Point of View' [OUP 2005], p.94
A Reaction
Put that way, the idea that it is built in seems much more plausible. If it is an add-on, an explanation of why that disposition is added to that particular property seems required. If it is built in, it seems legitimate to accept it as a brute fact.