Full Idea
It has been customary to see analytic truths as dividing into the logically necessary and the conceptually necessary.
Gist of Idea
Analytic truths are divided into logically and conceptually necessary
Source
Rod Girle (Modal Logics and Philosophy [2000], 7.3)
Book Reference
Girle,Rod: 'Modal Logics and Philosophy' [Acumen 2000], p.114
A Reaction
I suspect that this neglected distinction is important in discussions of Quine's elimination of the analytic/synthetic distinction. Was Quine too influenced by what is logically necessary, which might shift with a change of axioms?