She said they weren't told that the techniques WOULD be used.
Based on this document, it appears she was told they HAD been used.
That's all the wiggle room she needs.
Like Bill Clinton, talking about Lewinsky, saying “There IS no sex.” Technically, unless Monica was under the desk at exactly the moment Clinton gave his answer, then he was telling the truth. In his mind, anyway.
Back to the meaning of “is” again, are we? ;-)