/// <summary>
 /// Returns <c>true</c> if the antecedent and succedent are positively associated (in terms of Fisher quantifier).
 /// </summary>
 /// <returns><c>true</c> iff <c>(a * d) &gt; (b * c)</c> and <c>Sum[i = a..x] (x! * s! * k! * l!) / (n! * i! * (x-i)! * (k-i)! * (n+i-x-k)!) &lt;= alpha</c>, where <c>x = min(x, k)</c>.</returns>
 public override bool Validity(AbstractQuantifierSetting setting, Ice.Current __current)
 {
     FourFoldContingencyTable table = new FourFoldContingencyTable(setting.firstContingencyTableRows);
     return table.FisherValidity(Alpha);
 }