You don't know how dangerous he is.
It doesn't matter that the person selling pencils doesn't know how the pencil is made; he only needs to know how to sell them.
At about ten o' clock Robert Keyes brought Fawkes from Percy a watch, that he might know how the anxious hours were passing, and very shortly afterwards he was arrested, and the gunpowder discovered, by Thomas Knyvett, a Westminster magistrate.
Naw. I just wanted to know how much I left on the table.
The landlord was near spraining his wrist, and I told him for heaven's sake to quit--the bed was soft enough to suit me, and I did not know how all the planing in the world could make eider down of a pine plank.
So many different eyes, old and young, were fixed on her, and there were so many different faces, that she could not distinguish any of them and, feeling that she must speak to them all at once, did not know how to do it.
Remember that, my dear, and be nice to him, as you so well know how to be.
I mean, we know how we live and thus, how humans live.
It's just a matter of time until she and Bill get married and you know how Bill always liked this place.
Dusty didn't say what they both knew, that Darian's attempt to save the world broke something they didn't know how to fix.