Modus Ponens http://www.ksl.stanford.edu/software/IW/registry/SRC/IW-TEAM.daml Fri Jan 17 18:00:03 PST 2003 Fri Apr 25 13:37:22 PDT 2003 If A holds and A implies B then B holds. If every wine of type Chardonnay is WHITE ((type ?x Chardonnay)->(hasColor ?x WHITE)) and WINE1 is of type Chardonnay (type WINE1 Chardonnay) then WINE1 is white (hasColor WINE1 WHITE). (<= @S1 @S2)