public override Sentence visitBinarySentence(ComplexSentence s, object arg)
{
Sentence result = null;
if (s.isImplicationSentence())
{
// Eliminate =>, replacing α => β
// with ~α | β
Sentence alpha = s.getSimplerSentence(0).accept(this, arg);
Sentence beta = s.getSimplerSentence(1).accept(this, arg);
Sentence notAlpha = new ComplexSentence(Connective.NOT, alpha);
result = new ComplexSentence(Connective.OR, notAlpha, beta);
}
else
{
result = base.visitBinarySentence(s, arg);
}
return(result);
}