It is
of particular importance that the DNBC was carried out in a
society in which breastfeeding is the
norm — exclusive breastfeeding in Denmark usually lasts for 15 — 16 wk, until the time at which Danish health authorities recommend that solid foods be introduced to the infant's diet, and partial breastfeeding usually continues until or even beyond the end
of the maternity leave, which is ≥ 24 wk.
Similarly, if
society is proposed as an external condition for the existence
of a body
of laws, any
particular body
of laws being a product
of the
norms of that
society, then the
society can not at the same time be a product
of that law, or an internal aspect within the definition
of that law.