Full Idea
Frege's introduction of 'sense' was motivated by the desire to solve three problems: the problem of bearerless names, the problem of substitution in belief contexts, and the problem of informativeness.
Gist of Idea
'Sense' solves the problems of bearerless names, substitution in beliefs, and informativeness
Source
report of Gottlob Frege (works [1890]) by Alexander Miller - Philosophy of Language 2.9
Book Reference
Miller,Alexander: 'Philosophy of Language' [UCL Press 1998], p.67
A Reaction
A proposal which solves three problems sounds pretty good! These three problems can be used to test the counter-proposals of Russell and Kripke.