public static int SortOrder(this Negation f)
{
WFF i = f.inner;
if (i is AtomicWFF)
{
return(0);
}
else if (i is Biconditional)
{
return(2);
}
else if (i is Conditional)
{
return(1);
}
else if (i is Conjunction)
{
return(((Conjunction)i).arity);
}
else if (i is Disjunction)
{
return(1);
}
else if (i is Negation)
{
return(1);
}
else if (i is Quantifier)
{
return(1);
}
throw new NotImplementedException(f.GetType().ToString());
}
public static bool Decomposable(this Negation f)
{
WFF i = f.inner;
if (i is AtomicWFF)
{
return(false);
}
else if (i is Biconditional)
{
return(true);
}
else if (i is Conditional)
{
return(true);
}
else if (i is Conjunction)
{
return(true);
}
else if (i is Disjunction)
{
return(true);
}
else if (i is Negation)
{
return(true);
}
else if (i is Quantifier)
{
return(true);
}
throw new NotImplementedException(f.GetType().ToString());
}
