Full Idea
It is widely agreed that '¬', '&', and 'v' are 'truth functions': the truth value of a compound sentence formed using them is fully determined by the truth value or values of the component sentences.
Gist of Idea
'¬', '&', and 'v' are truth functions: the truth of the compound is fixed by the truth of the components
Source
Frank Jackson (Conditionals [2006], 'Equiv')
Book Reference
'Blackwell Guide to Philosophy of Language', ed/tr. Devitt,M/Hanley,R [Blackwell 2006], p.212
A Reaction
A candidate for not being a truth function might be a conditional →, where the arrow adds something over and above the propositions it connects. The relationship has an additional truth value? Does A depend on B?