Full Idea
Models generally deliberately leave out meaning, retaining only what is important for the determination of truth values.
Gist of Idea
Models leave out meaning, and just focus on truth values
Source
John P. Burgess (Philosophical Logic [2009], 2.2)
Book Reference
Burgess,John P.: 'Philosophical Logic' [Princeton 2009], p.20
A Reaction
This is the key point to hang on to, if you are to avoid confusing mathematical models with models of things in the real world.