 Some philosophers seem to think that rigid terms are just those coined in accordance with a baptism like the  above.[7]  But causal grounding is not closely tied to rigidity. Since many philosophers deny that rigidity applies to designators for kinds (see below), designators for other entities serve better to illustrate. First, designators that are rigid can fail to be causally grounded. ‘The successor of 2’, which is rigid de facto, may be a case in point. ‘3’ might be an example of a rigid de jure term that is not causally grounded. And there can evidently be terms for concrete objects that are rigid but not causally grounded. You coin ‘Joy’ in the following way: “‘Joy’ is to be used for the most joy-filled individual.” Here you use the description to fix the reference, not as a synonym: whatever individual is most filled with joy is the designatum, even when we are discussing worlds in which that same individual is glum. Reference is not secured by way of causal grounding; you never point to anything in a baptismal  ceremony.[8]  Yet the designator is rigid.