Bijaya

Yes, I would agree that morality is always in need of a theoretical justification, at least if we are to put it to the test of logic. But I doubt that morality is a presupposition we have to begin with.
 
I'd rather say that if a world-theory does not ineluctably give rise to a moral scheme then it is inadequate to its purpose. A world-theory may or may not be founded on presuppositions, (since if Indian philosophy has any truth at all in it then presuppositions would be unnecessary in the long term). I see a central message of this philosophy as being that we shouldn't presuppose things.