“…Hence, non-classical logic (fuzzy logic or multi-valued logic) should be the appropriate foundation for automated reasoning with uncertainty, and has become an active research area. Due to common efforts of many researchers, both theory and applications in non-classical logic have been extensively developed in recent years (Morgan, 1976;Dubois et al, 1989;Dubois and Prade, 1990;Liu, 1994;Baaz and Fermuller, 1995;Liu, 1998;Xu et al, 2000bXu et al, , 2001bXu et al, , 2003Xu et al, , 2009.…”