This philosopher argued that finding out that gold is actually blue, not yellow, would not disprove the existence of gold, to demonstrate the yellowness is a "phenomenal" rather than an "essential" property of gold. He created an eccentric alteration of the addition operation called "quus" to illustrate his interpretation of an earlier philosopher's ideas on (*) rule-following. That interpretation of Philosophical Investigations appears in his Wittgenstein on Rules and Private Language. Another of his works is a sustained attack on the theory that proper names function as definite descriptions, and invented a term for names that refer to the same thing in all possibl
This philosopher argued that finding out that gold is actually blue, not yellow, would not disprove the existence of gold, to demonstrate the yellowness is a "phenomenal" rather than an "essential" property of gold. He created an eccentric alteration of the addition operation called "quus" to illustrate his interpretation of an earlier philosopher's ideas on (*) rule-following. That interpretation of Philosophical Investigations appears in his Wittgenstein on Rules and Private Language. Another of his works is a sustained attack on the theory that proper names function as definite descriptions, and invented a term for names that refer to the same thing in all possible worlds in which that thing exists. For 10 points, name this philosopher who introduced "rigid designators" in Naming and Necessity.
This philosopher argued that finding out that gold is actually blue, not yellow, would not disprove the existence of gold, to demonstrate the yellowness is a "phenomenal" rather than an "essential" property of gold.