private static bool DecisionsAreConsistent(Alethicity aAlethicity, Prover9Mace4.Result aResult)
{
if (aResult == Prover9Mace4.Result.NoDecision)
{
return(true);
}
if (aAlethicity == Alethicity.Necessary &&
aResult != Prover9Mace4.Result.Necessary &&
aResult != Prover9Mace4.Result.Possible)
{
return(false);
}
if (aAlethicity == Alethicity.Impossible &&
aResult != Prover9Mace4.Result.Impossible &&
aResult != Prover9Mace4.Result.Unnecessary)
{
return(false);
}
if (aAlethicity == Alethicity.Contingent &&
(aResult == Prover9Mace4.Result.Necessary || aResult == Prover9Mace4.Result.Impossible))
{
return(false);
}
return(true);
}
public static Alethicity GetDecision(string aText)
{
Matrix lProposition = Parser.Parse(aText.Split('\n'));
Alethicity lDecision = lProposition.Decide();
Prover9Mace4.Result lProver9sDecision = Prover9Mace4.Decide(lProposition, Prover9Mace4Timeout);
Console.WriteLine("Prover9/Mace4 decided {0}.", lProver9sDecision);
Assert.IsTrue(
DecisionsAreConsistent(lDecision, lProver9sDecision),
string.Format("Inconsistent decisions: {0}, {1}", lDecision, lProver9sDecision));
return(Parser.Parse(aText.Split('\n')).Decide());
}
public static string TextForDecision(Alethicity lDecision)
{
switch (lDecision)
{
case Alethicity.Necessary:
return("necessarily true");
case Alethicity.Contingent:
return("contingent");
case Alethicity.Impossible:
return("self-contradictory");
default:
throw new NotImplementedException(
String.Format("The value Alethicity.{0} is not supported by this application.", lDecision));
}
}