'Return ``True`` if two isolation intervals are disjoint.'

def is_disjoint(self, other):

    if (self.conj != other.conj):
        return True
    re_distinct = ((self.bx <= other.ax) or (other.bx <= self.ax))
    if re_distinct:
        return True
    im_distinct = ((self.by <= other.ay) or (other.by <= self.ay))
    return im_distinct
