:- op(1,'xfy','contains') .
puzzle(CULPRITs)
:-
there_are_three_culprits(CULPRITs) ,
the_set_of_first_names_is_known(CULPRITs) ,
the_set_of_last_names_is_known(CULPRITs) ,
the_set_of_ages_is_known(CULPRITs) ,
one_is_three_years_older(CULPRITs)
.
there_are_three_culprits(CULPRITs)
:-
length(CULPRITs,3)
.
the_set_of_first_names_is_known(CULPRITs)
:-
CULPRITs contains {first_name:'Angela',last_name:_,age:_} ,
CULPRITs contains {first_name:'Mary',last_name:_,age:_} ,
CULPRITs contains {first_name:'David',last_name:_,age:_}
.
the_set_of_last_names_is_known(CULPRITs)
:-
CULPRITs contains {first_name:_,last_name:'Diamond',age:_} ,
CULPRITs contains {first_name:_,last_name:'Grant',age:_} ,
CULPRITs contains {first_name:_,last_name:'Leung',age:_}
.
the_set_of_ages_is_known(CULPRITs)
:-
CULPRITs contains {first_name:_,last_name:_,age:5} ,
CULPRITs contains {first_name:_,last_name:_,age:7} ,
CULPRITs contains {first_name:_,last_name:_,age:8}
.
one_is_three_years_older(CULPRITs)
:-
CULPRITs contains {first_name:_,last_name:'Grant',age:AGE_GRANT} ,
CULPRITs contains {first_name:_,last_name:'Leung',age:AGE_LEUNG} ,
AGE_GRANT is AGE_LEUNG + 3
.
CULPRITs contains CULPRIT
:-
prolog:member(CULPRIT,CULPRITs)
.
这个谜题没有明确的答案。有了给定的线索,仍然有 36 种可能的解决方案。
/*
?- puzzle(CULPRITs).
CULPRITs = [{first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Grant', age:8}, {first_name:'David', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Leung', age:5}, {first_name:'David', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Angela', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Angela', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Angela', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Leung', age:5}, {first_name:'David', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Angela', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Grant', age:8}, {first_name:'David', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Angela', last_name:'Grant', age:8}, {first_name:'David', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Angela', last_name:'Leung', age:5}, {first_name:'David', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Angela', last_name:'Grant', age:8}, {first_name:'David', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Angela', last_name:'Leung', age:5}, {first_name:'David', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Grant', age:8}, {first_name:'David', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Leung', age:5}, {first_name:'David', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Mary', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Mary', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Mary', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Leung', age:5}, {first_name:'David', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Mary', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Grant', age:8}, {first_name:'David', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'David', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'David', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'David', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'David', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'David', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'David', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'David', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Mary', last_name:'Grant', age:8}, {first_name:'David', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'Mary', last_name:'Leung', age:5}, {first_name:'David', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'Mary', last_name:'Grant', age:8}, {first_name:'David', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'Mary', last_name:'Leung', age:5}, {first_name:'David', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'David', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'David', last_name:'Diamond', age:7}, {first_name:'Mary', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'David', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Leung', age:5}] ;
CULPRITs = [{first_name:'David', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Diamond', age:7}, {first_name:'Angela', last_name:'Grant', age:8}] ;
CULPRITs = [{first_name:'David', last_name:'Grant', age:8}, {first_name:'Mary', last_name:'Leung', age:5}, {first_name:'Angela', last_name:'Diamond', age:7}] ;
CULPRITs = [{first_name:'David', last_name:'Leung', age:5}, {first_name:'Mary', last_name:'Grant', age:8}, {first_name:'Angela', last_name:'Diamond', age:7}] ;
false .
*/