Full Idea
People once took indexicality to be exclusively a property of language, ....but a series of examples seemed to establish that the thought expressed by uttering an indexical sentence is itself indexical (and is thus 'essential').
Gist of Idea
Indexicality is not just a feature of language; examples show it also occurs in thought
Source
François Recanati (Mental Files in Flux [2016], 6.1)
Book Reference
Recanati,François: 'Mental Files in Flux' [OUP 2016], p.97
A Reaction
Perry's example of not realising it is him leaking the sugar in a supermarket is the best known example. Was this a key moment for realising that philosophy of thought is (pace Dummett) more important than philosophy of language?