ISBN-13: 9780415581257 / Angielski / Miękka / 2011 / 80 str.
ISBN-13: 9780415581257 / Angielski / Miękka / 2011 / 80 str.
Putnam's essay concerns itself with the ontological problem in the philosophy of logic and mathematics - that is, the issue of whether the abstract entities spoken of in logic and mathematics really exist.