Philosophy Hurts Your Head

The blog of a cranky Philosophy PhD Student from Newcastle, Australia.

Archive for April, 2007

Question: Rigid Designators and Necessity

Posted by Sam D on April 4, 2007

 If A and B are both rigid designators, and A = B, then A necessarily equals B (doesn’t it?)

If we can show that A does not necessarily equal B, then ( if they are rigid designators) we can say that A does not equal B.

But what if A or B is not a rigid designator? What can we take from that if someone is claiming this relationship of necessity? If one of them isn’t, then it seems to me that this relationship is destroyed. But we then can’t take the further step to say that  A does not equal B.

How generic can a rigid designator be?

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