It, Not It, and the Difference

public static Specification<Foo> OkCriteria(Boolean isOk)
{
   if (isOk)
   {
      return new AdHocSpecification<Foo>(f => f.Bars.Where(br => br.Bazes.Where(bz =>
            bz.Ok).Count() > 0).Count() > 0);
   } else {
      return new AdHocSpecification<Foo>(f => f.Bars.Where(br => br.Bazes.Where(bz =>
            bz.Ok).Count() > 0).Count() == 0);
   }
}