private bool createAllConHoldersAndTruthtables(string proposition)
{
try
{
//CREATING PROPOSITION
Connective con = PropositionReader.ReadPropositionString(proposition);
if (con.IsNormalProposition())
{
conHolder = new ConnectiveHolder(con);
table = new Truthtable(conHolder);
printDisjunctive();
conHolderDisjunctive = new ConnectiveHolder(tbDisjunctiveParse.Text);
tableDisjunctive = new Truthtable(conHolderDisjunctive);
conHolderDisjunctiveSimple = new ConnectiveHolder(tbDisjunctiveSimpleParse.Text);
tableDisjunctiveSimple = new Truthtable(conHolderDisjunctiveSimple);
conHolderNand = conHolder.GetNandHolder();
tableNand = new Truthtable(conHolderNand);
conHolderNandSimple = conHolderDisjunctiveSimple.GetNandHolder();
tableNandSimple = new Truthtable(conHolderNandSimple);
tbInfix.Text = conHolder.GetInfixString();
tbNand.Text = conHolderNand.GetParseString();
tbNandSimple.Text = conHolderNandSimple.GetParseString();
showTableauxTree = false;
//DRAWING AND PRINTING TABLE INFORMATION
printVisualTruthtables(table);
printTablesInformation();
}
else
{
if (!con.AreLocalArgumentsMatching(new List <char>(), new List <char>()))
{
throw new Exception("Local Arguments are mismatching or there are quantifiers with the same Local Argument");
}
conHolder = new ConnectiveHolder(con);
tbInfix.Text = conHolder.GetInfixString();
showTableauxTree = false;
}
Console.WriteLine("Succesfully parsed proposition: " + proposition);
}
catch (NullReferenceException)
{
MessageBox.Show("Parsing failed: please make sure that you wrote a proposition");
Console.WriteLine("Failed to parse proposition: " + proposition);
return(false);
}
catch (Exception ex)
{
MessageBox.Show("Parsing failed: " + ex.Message);
Console.WriteLine("Failed to parse proposition: " + proposition);
return(false);
}
return(true);
}
public override bool IsNormalProposition()
{
return(con1.IsNormalProposition());
}
//CREATING A NEW VARIABLE NEEDED
public List <Connective> ApplyDeltaTableauxRules(List <char> usedArguments, List <char> availableArguments)
{
List <Connective> results = new List <Connective>();
if (element.IsNormalProposition())
{
return(results);
}
if (element is QuantifierExists)
{
QuantifierExists qe = (QuantifierExists)element;
QuantifierExists qeCopy = (QuantifierExists)element.Copy();
char qeArgument = qe.Argument;
if (availableArguments.Count > 0)
{
if (qeCopy.ChangeLocalArgument(qeArgument, availableArguments[0]))
{
usedArguments.Add(availableArguments[0]);
availableArguments.RemoveAt(0);
Connective newElement = qeCopy.Con1;
results.Add(newElement);
}
}
else
{
throw new Exception("Not enough available arguments");
}
}
else if (element is ConnectiveNot)
{
ConnectiveNot cn = (ConnectiveNot)element;
if (cn.Con1 is QuantifierForAll)
{
QuantifierForAll qfa = (QuantifierForAll)cn.Con1;
QuantifierForAll qfaCopy = (QuantifierForAll)cn.Con1.Copy();
char qfaArgument = qfa.Argument;
if (availableArguments.Count > 0)
{
if (qfaCopy.ChangeLocalArgument(qfaArgument, availableArguments[0]))
{
usedArguments.Add(availableArguments[0]);
availableArguments.RemoveAt(0);
ConnectiveNot newNot = new ConnectiveNot();
newNot.setLeftConnective(qfaCopy.Con1);
Connective newElement = newNot;
results.Add(newElement.Copy());
}
}
else
{
throw new Exception("Not enough available arguments");
}
}
}
return(results);
}