You seem to have missed the point. If we have to disregard any study in which one or more participants lied, then we may as well trash the criminal justice system, since few defendants will tell the unswerving truth. Yet you would have us ignore the entire 9/11 Commission Report on a similar basis.
But look carefully at what you've written above:
"The chairman admitted that they were lied to." Admitted? Poor word choice. He did not lie, therefore he has nothing to admit.
Instead it would be more correct to say that the Chairman
determined that he was lied to. How else would he know this in order to tell us?
How did he determine this? There are many ways:
- Those who lied may have corrected themselves later
- Testimony was found to be inconsistent with other testimony
- Testimony was found to be inconsistent with facts
Pay particular attention to that last bullet -- in many cases, lies can be detected
and corrected on the basis of
evidence.
The fact that the 9/11 Commission Chairman is aware of lies does not invalidate its conclusions. Far from it. A few lies (and prevarications, omissions, exaggerations, and simple mistakes) are expected in any investigation. Because he was able to detect and correct them, this demonstrates that the investigation was thorough and self-consistent.
Now, if you'd like to follow this line of reasoning further, how about you take a crack at some
evidence? Why don't you find out what lies he's referring to, back it up with some citations (newspaper articles are fine), and try to dig in a bit further. I'm already aware of several of these, and they don't cast any doubt at all on the official story in my opinion. Let's see what you can find.
Deal?