Apparently Clapper is lying about lying too[1]. According to Wyden[2], the question he asked was actually given to Clapper in advance so the idea that Clapper didn't understand exactly what Wyden was referring to seems like a load of bull.

Realistically though do we expect honest testimony from people who's job it is to do secret stuff like this?

[1] http://www.salon.com/2013/07/01/this_man_is_still_lying_to_a...

[2] http://www.wyden.senate.gov/news/press-releases/wyden-statem...