//public bool Alpha(bool implication, string alpha)
//{
// if(alpha == true)
//}
//check each sentence with model
public bool EachKBTrue(Sentences KB, TTModel model)
{
if (KB.symbol != null)
{
if (!EachKBTrueInModel(KB.symbol, model))
{
return(false);
}
}
else if (KB.connective == "=>" && KB.children[0].symbol != null)
{
// Console.WriteLine(KB.children[0].symbol);
//Console.WriteLine(KB.children[1].symbol);
if (!EachKBTrueInModel(KB.children[1].symbol, model))
{
return(!EachKBTrueInModel(KB.children[1].symbol, model));
}
}
else if (KB.connective == "=>" && KB.children[0].symbol == null)
{
//Console.WriteLine("{0}{1}{2}{3}{4}", KB.children[0].children[0].symbol, KB.children[0].connective,
// KB.children[0].children[1].symbol, KB.connective, KB.children[1].symbol);
if (!EachKBTrueInModel(KB.children[1].symbol, model))
{
return((!EachKBTrueInModel(KB.children[0].children[0].symbol, model)) && (!EachKBTrueInModel(KB.children[0].children[1].symbol, model)));
}
}
return(true);
}
public void GetKnowledgeBase(string clausesString)
{
string[] clauses = clausesString.Split(';');
foreach (string s in clauses)
{
if (AtomicSentence(s))
{
KB.Add(new Sentences(s));
}
else if (!s.Contains("&"))
{
string tempKB = s;
tempKB = tempKB.Replace("=>", ";");
string[] tempKBChildren = tempKB.Split(';');
KB.Add(new Sentences("=>", tempKBChildren));
}
else
{
string tempKB = s;
tempKB = tempKB.Replace("=>", ";");
string[] tempKBChildrenA = tempKB.Split(';');
string[] tempKBChildrenB = tempKBChildrenA[0].Split('&');
Sentences tempSentence = new Sentences("&", tempKBChildrenB);
Sentences[] tempSentenceArray = { tempSentence, new Sentences(tempKBChildrenA[1]) };
KB.Add(new Sentences("=>", tempSentenceArray));
}
}
}
public bool TTCheckAll(List <Sentences> KB, Sentences alpha, Queue <string> symbolsQ, Dictionary <string, bool> model)
{
if (symbolsQ.Count == 0)
{
if (KBTrue(KB, model))
{
if (EachSentence(alpha, model))
{
a++;
}
else
{
b++;
}
}
}
else
{
string topSymbol = symbolsQ.Dequeue();
return((TTCheckAll(KB, alpha, new Queue <string>(symbolsQ), AddToDictionary(model, topSymbol, true)) &&
(TTCheckAll(KB, alpha, new Queue <string>(symbolsQ), AddToDictionary(model, topSymbol, false)))));
}
return(true);
}
public void PlFcEntails(List <Sentences> kb, Sentences alpha)
{
Dictionary <Sentences, int> Clauses = new Dictionary <Sentences, int>(clauses);
Queue <string> printResult = new Queue <string>();
bool end = false;
while (agenda.Count != 0 && !end)
{
string currentAgenda = agenda.Dequeue();
printResult.Enqueue(currentAgenda);
if (currentAgenda == alpha.symbol)
{
end = true; break;
}
if (inferred.ContainsKey(currentAgenda))
{
inferred[currentAgenda] = true;
}
// if currentAgends (symbol) is present in PREMISE of sentence, -1 for its int
foreach (KeyValuePair <Sentences, int> s in Clauses)
{
PremiseContainAgenda(s.Key, currentAgenda);
}
// when int is 0 change false to true in inferred
foreach (KeyValuePair <Sentences, int> s in clauses)
{
if (s.Value <= 0 && s.Key.symbol == null)
{
if (!agenda.Contains(s.Key.children[1].symbol) &&
!printResult.Contains(s.Key.children[1].symbol))
{
agenda.Enqueue(s.Key.children[1].symbol);
}
}
}
}
//write answer - if found write path - else not found
if (printResult.Contains(alpha.symbol))
{
Console.Write("YES:");
foreach (string s in printResult)
{
Console.Write(" {0}", s);
}
}
else
{
Console.WriteLine("NO");
}
}
// returns each sentence KB in string
public string GetKB(Sentences s)
{
if (s.symbol != null)
{
return(s.symbol);
}
else
{
return(GetKB(s.children[0]) + s.connective + GetKB(s.children[1]));
}
}
public bool Antecedent(Sentences s, Dictionary <string, bool> model)
{
// checks single antecedents like p1, a, b
if (s.symbol != null)
{
return(!model[s.symbol]);
}
else
{
// // checks && sentences like a&b
return(!(model[s.children[0].symbol] && model[s.children[1].symbol]));
}
}
// returns 0 for Atanomus sentence like p
// returns 1 for sentence like p => e
// returns 2 for sentence like p&g => e
public int GetSentenceCount(Sentences sent)
{
int temp = 0;
if (sent.symbol != null)
{
//temp++;
return(temp);
}
else
{
temp++;
foreach (Sentences s in sent.children)
{
temp += GetSentenceCount(s);
}
return(temp);
}
}
public bool BC(List <Sentences> kb, Sentences alpha, Stack <string> printResult)
{
if (inferredTrue.Contains(alpha.symbol))
{
return(true);
}
foreach (Sentences s in kb)
{
if (s.symbol != null)
{
if (s.symbol == alpha.symbol)
{
return(true);
}
}
else if (s.children[1].symbol == alpha.symbol)
{
if (s.children[0].symbol != null)
{
if (!printResult.Contains(s.children[0].symbol))
{
printResult.Push(s.children[0].symbol);
}
return(BC(kb, s.children[0], printResult));
}
else
{
if (!printResult.Contains(s.children[0].children[0].symbol))
{
printResult.Push(s.children[0].children[0].symbol);
}
if (!printResult.Contains(s.children[0].children[1].symbol))
{
printResult.Push(s.children[0].children[1].symbol);
}
return(BC(kb, s.children[0].children[0], printResult) && BC(kb, s.children[0].children[1], printResult));
}
}
}
return(false);
}
// if currentAgends (symbol) is present in PREMISE of sentence, -1 for its int
public void PremiseContainAgenda(Sentences s, string currentAgenda)
{
if (s.symbol == null)
{
if (s.children[0].symbol != null)
{
if (s.children[0].symbol == currentAgenda)
{
clauses[s]--;
}
}
else
{
if (s.children[0].children[0].symbol == currentAgenda || s.children[0].children[1].symbol == currentAgenda)
{
clauses[s]--;
}
}
}
}
public bool EachSentence(Sentences s, Dictionary <string, bool> model)
{
if (s.symbol != null)
{
// checks single sentences like p1, a, b
if (model.ContainsKey(s.symbol))
{
return(model[s.symbol]);
}
}
else
{
// if consequent is false it needs to checks antecedent
if (!model[s.children[1].symbol])
{
return(Antecedent(s.children[0], model));
}
return(true);
}
return(false);
}
public bool KBSetUp(Sentences KB, TTModel model, string alpha)
{
bool childZero;
bool childOne = true;
bool alphaBool = true;
bool andChildOne = false;
bool andChildZero = false;
if (KB.connective == "=>")
{
if (KB.children[0].connective == null)
{
foreach (KeyValuePair <string, bool> s in model.ModelDictionary)
{
if (KB.children[0].symbol == s.Key)
{
childZero = s.Value;
}
if (alpha == s.Key)
{
alphaBool = s.Value;
//Console.WriteLine(s.Key);
}
}
}
else
{
foreach (KeyValuePair <string, bool> s in model.ModelDictionary)
{
if (KB.children[0].children[0].symbol == s.Key)
{
andChildZero = s.Value;
}
if (KB.children[0].children[1].symbol == s.Key)
{
andChildOne = s.Value;
}
}
}
if (KB.children[1].connective == null)
{
foreach (KeyValuePair <string, bool> s in model.ModelDictionary)
{
if (KB.children[1].symbol == s.Key)
{
childOne = s.Value;
//Console.WriteLine(s.Key);
}
}
}
if (KB.connective == null)
{
if (KB.children == null)
{
foreach (KeyValuePair <string, bool> s in model.ModelDictionary)
{
if (KB.symbol == s.Key)
{
childOne = s.Value;
}
}/// ????????????????????????????????
}
}
}
childZero = andLogic(andChildOne, andChildZero);
if (Implication(childOne, childZero) && alphaBool)
{
Console.WriteLine("TRUE");
}
return(true);
}
