Vague expression permits the hearer to imagine whatever suits him and what he already thinks in any case. Rigorous formulation demands unequivocal comprehension, conceptual effort, to which people are deliberately disencouraged, and imposes on them in advance of any content a suspension of all received opinions, and thus an isolation, that they violently resist. Only what they do not need first to understand, they consider understandable; only the word coined by commerce, and really alienated, touches them as familiar.