Full Idea
It is contingently true that 'snow is white' expresses the proposition that snow is white.
Gist of Idea
'Snow is white' only contingently expresses the proposition that snow is white
Source
Trenton Merricks (Propositions [2015], 1.V n14)
Book Reference
Merricks,Trenton: 'Propositions' [OUP 2015], p.25
A Reaction
Tarski stuck to sentences, but Merricks rightly argues that truth concerns propositions, not sentences. Sentences are subservient entities - mere tools used to express what matters, which is our thoughts (say I).