P36: Inadequate and confused ideas follow with the same necessity as adequate, or clear and distinct ideas.

Dem.: All ideas are in God/Nature (by IP15); and, insofar as they are related to God/Nature, are true (by P32), and (by P7 C) adequate. And so there are no inadequate or confused ideas except insofar as they are related to the singular Mind of someone (see P24 and P28). And so all ideas—both the adequate and the inadequate—follow with the same necessity (by P6 C), q.e.d.