Most objections to the reintroduction of a female monastic role hinge on the fact that the monastic rules require that both five ordained monks and five ordained bhikkhunis be present for any new bhikkhuni ordination. Without such a quorum, critics say that it is not possible to ordain any new Theravada bhikkhuni. The Thai hierarchy refuses to recognize ordinations in the Dharmaguptaka tradition (the only currently existing bhikkhuni ordination lineage) as valid Theravada ordinations, citing differences in philosophical teachings and, more critically, monastic discipline.