2Habermas.Justification and Application:Remarks on Discourse Ethics.Cambridge:Polity Press,1993:48.
3J.Donald Moon.Practical Discourse and Communicative Ethics in the Cambridge Companion to Habermas.Edited by Stephen K.White.Cambridge:Cambridge University Press,1995:143.
4Habermas.Moral Consciousness and Communicative Action.Cambridge:MIT Press,1990:65.
5William Rehg.Insight and Solidarity,A Study in the Discourse Ethics of Jurgen Habermas.Berkeley:University of California Press,1994:249.