% /* % PFC is a language extension for prolog.. there is so much that can be done in this language extension to Prolog % % props(Obj,[height(ObjHt)]) == t(height,Obj,ObjHt) == rdf(Obj,height,ObjHt) == t(height(Obj,ObjHt)). % padd(Obj,[height(ObjHt)]) == prop_set(height,Obj,ObjHt,...) == ain(height(Obj,ObjHt)) % [pdel/pclr](Obj,[height(ObjHt)]) == [del/clr](height,Obj,ObjHt) == [del/clr]svo(Obj,height,ObjHt) == [del/clr](height(Obj,ObjHt)) % keraseall(AnyTerm). % % ANTECEEDANT CONSEQUENT % % P = test nesc true assert(P),retract(~P) , enable(P). % ~P = test nesc false assert(~P),retract(P), disable(P). % % ~ ~(P) = rewrite_to \+ ~(P) rewrite_to \+ ~(P) % ~ \+(P) = rewrite_to (P) rewrite_to (P) % \+ ~(P) = test impossiblity is unknown retract(~P). % \+(P) = test P is unknown retract(P) % % Dec 13, 2035 % Douglas Miles % */ %# Tests retraction of ain/1 :- include(test_header). :- set_fileAssertMt(header_sane). :- file_begin(pfc). dmilesWorld. dmilesWorld ==> inChair(a). :- ain(\+ dmilesWorld). :- listing_u(inChair). :- mpred_test(\+ inChair(a)).