They can share information with their friends without their parents, or other adults, knowing what they are saying.

VOA: special.2009.12.04

I did not talk through my hat or say something without knowing the facts.

VOA: special.2010.05.09

Yet people who seem healthy can suffer a stroke without even knowing it.

VOA: special.2009.09.22

Without knowing it, he had split the atom.

VOA: special.2009.06.14

So in many, many cases young people engage in sexual relations without even knowing what are the prevention measures,".

VOA: standard.2009.04.24