Full Idea
The great deniers of properties and relations are of two sorts: those who put their faith in predicates and those who appeal to sets (classes).
Gist of Idea
Deniers of properties and relations rely on either predicates or on classes
Source
David M. Armstrong (Properties [1992], §1)
Book Reference
'Properties', ed/tr. Mellor,D.H. /Oliver,A [OUP 1997], p.161
A Reaction
This ignores the Quine view, which is strictly for ostriches. Put like this, properties and relations seem undeniable. Predicates are too numerous (gerrymandering) or too few (colour shades). Classes can have arbitrary members.