The problem is that "lie" also means to not tell the truth, as in "I lied to my mother."

VOA: special.2010.02.11

Tell all the Truth but tell it slant -- The truth about Emily Dickinson has been difficult to discover.

VOA: special.2010.07.18

"I am still a fan. I have not kept up with the latest ones, to tell you the truth,".

VOA: standard.2009.10.22

"I don't care what happens, I hope I am alive to really look into Obasanjo's face one day and ask him to tell the world the truth about what happened.

VOA: standard.2009.11.10

"To tell you the truth,I had sung . all the songs I knew, and I am going ' What am I going to do now,'" "And in my mind I'm going 'you know, this is the freedom that my generation is looking for,"

VOA: standard.2009.08.15