Full Idea
As Evans emphasises, what matters when we want to individuate semantic content is what would count as a proper understanding of an utterance; but 'understanding' defines the task of the hearer.
Gist of Idea
The content of thought is what is required to understand it (which involves hearers)
Source
François Recanati (Mental Files [2012], 16.2)
Book Reference
Recanati,François: 'Mental Files' [OUP 2012], p.215
A Reaction
[cites Evans 1982: 92, 143n, 171] I like to place (following Aristotle) understanding at the centre of all of philosophy, so this seems to me an appealing idea. It makes misunderstandings interesting.