public static FOLKnowledgeBase createRingOfThievesKnowledgeBase( InferenceProcedure infp) { FOLKnowledgeBase kb = new FOLKnowledgeBase(DomainFactory .ringOfThievesDomain(), infp); // s(x) => ~c(x) One who skis never gets caught kb.tell("(Skis(x) => NOT(Caught(x)))"); // c(x) => ~s(x) Those who are caught don't ever ski kb.tell("(Caught(x) => NOT(Skis(x)))"); // p(x,y) & c(y) => s(x) Jailbird parents have skiing kids kb.tell("((Parent(x,y) AND Caught(y)) => Skis(x))"); // s(x) & f(x,y) => s(y) All friends ski together kb.tell("(Skis(x) AND Friend(x,y) => Skis(y))"); // f(x,y) => f(y,x) Friendship is symmetric kb.tell("(Friend(x,y) => Friend(y,x))"); // FACTS // 1. { p(Mike,Joe) } Premise kb.tell("Parent(Mike, Joe)"); // 2. { p(Janet,Joe) } Premise kb.tell("Parent(Janet,Joe)"); // 3. { p(Nancy,Mike) } Premise kb.tell("Parent(Nancy,Mike)"); // 4. { p(Ernie,Janet) } Premise kb.tell("Parent(Ernie,Janet)"); // 5. { p(Bert,Nancy) } Premise kb.tell("Parent(Bert,Nancy)"); // 6. { p(Red,Ernie) } Premise kb.tell("Parent(Red,Ernie)"); // 7. { f(Red,Bert) } Premise kb.tell("Friend(Red,Bert)"); // 8. { f(Drew,Nancy) } Premise kb.tell("Friend(Drew,Nancy)"); // 9. { c(Mike) } Premise kb.tell("Caught(Mike)"); // 10. { c(Ernie) } Premise kb.tell("Caught(Ernie)"); return(kb); }