I know what you mean, but respectfully disagree - honestly, I think the jargon is for academic cover, to make it most aceptable in the millieu in which he works - and this may come completely naturally to him, may not be an affectation, though, paradoxically, it really is. The language, for me, tends to obscure the discourse, to make it less meaningful as, paradoxically once again, it mimics the surface of meaning. Lewis does this less than a lot of academics, but he still does it on every page. Ironically or not, it does the opposite of what he intends, creating, as academics regularly do, a wall between the experience and the description of that experience. The ultimate effect is to replace linguistic style with mannerism -