Define "truth" because I need to make sure I understand the context. Do you mean am I now telling the "truth" or do you mean *was* I telling the "truth" before? Because if you mean am I telling the "truth" at this moment, no I am not telling the "truth" right at this moment because I wouldn't know the "truth" if it slipped up and bit my on the butt. But if you mean *was* I telling the "truth" in the past, well of course, I can not refute that, as it would be untruthful...
Ah, ok, :hand over microphone leaning down to the side and whispering to aide "did anyone follow that?": anyone one else have any questions for our distinguished captive?