The physicist who states a law of nature with the aid of a mathematical formula is abstracting a real feature of a real material world, even if he has to speak of numbers, vectors, tensors, state-functions, or whatever to make the abstraction.
Hilary PutnamI can only please one person per day. Today isn't your day, tomorrow doesn't look good either.
Hilary PutnamNo sane person should believe that something is subjective merely because it cannot be settled beyond controversy.
Hilary Putnam