Full Idea
Quine's doctrine is that the predicate of a true statement carries no ontological implications.
Gist of Idea
Quine says the predicate of a true statement has no ontological implications
Source
report of Willard Quine (works [1961]) by David M. Armstrong - Properties §1
Book Reference
'Properties', ed/tr. Mellor,D.H. /Oliver,A [OUP 1997], p.165
A Reaction
Quine is ontologically committed to the subject of the statement (an object). The predicate seems to be an inseparable part of that object. Quine is, of course, a holist, so ontological commitment isn't judged in single statements.