Who said "Sets exist, but not in the way numbers or properties do."?

This quote is attributed to Putnam, Hilary.

Sets exist, but not in the way numbers or properties do. - Putnam, Hilary

"Sets exist, but not in the way numbers or properties do."

Putnam, Hilary Philosophy

Philosopher American 1926–2016

"The world is not intrinsically divided into minds and physical objects."

"Realism is not the view that the world exists independently of all schemes of description."

"Truth is not correspondence to reality."

"We can have a rational picture of the world only if we are willing to question our intuitions."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."