Full Idea
Although we classify ideas by content for many purposes, we do not individuate them by content. The content of an idea can change.
Gist of Idea
Although we may classify ideas by content, we individuate them differently, as their content can change
Source
John Perry (Knowledge, Possibility and Consciousness [2001], §3.2)
Book Reference
Perry,John: 'Knowledge, Possibility and Consciousness' [MIT 2001], p.51
A Reaction
As the compiler of this database, I find this very appealing. The mind works exactly like a database. I have a 'file' (Perry's word) marked "London", the content of which undergoes continual change. I am a database management system.