Translation of "unsure" into Russian

We were unsure what kind of person Tom would be and whether he would like living in the same house as us.

Мы были не уверены, какой Том человек, и хотел ли бы он жить с нами в одном доме.

The language used in reports on these speculations about the genetic basis for behavior is often vague and unsure.

О рассуждениях насчет генетической природы поведения пишут часто весьма туманно и неопределенно.

But reason, to me, seems unsure of its place in the world.

Но разум, для меня, кажется ненадежным.