Editing Rigid designator (section)

==Causal-historical theory of reference==
{{see also|Causal-historical theory of reference}}
Proper names rigidly designate for reasons that differ from natural kinds terms. The reason '[[Johnny Depp]]' refers to one particular person in all possible worlds is because some person initially gave the name to him by saying something like "Let's call our baby 'Johnny Depp'". This is called the initial baptism. This usage of 'Johnny Depp' for referring to some particular baby got passed on from person-to-person in a giant [[Causal theory of reference|causal and historical chain of events]]. That is why everybody calls Johnny Depp 'Johnny Depp'. Johnny's mother passed it onto her friends who passed it onto their friends who passed it onto their friends, and so on.