Peter Gärdenfors Sten Lindström Michael Morreau Wlodzimierz Rabinowicz The negative Ramsey test: another triviality result. 129-134 1989 conf/ltc/1989 The Logic of Theory Change db/conf/ltc/ltc1989.html#GardenforsLMR89 http://dx.doi.org/10.1007/BFb0018419