The mind-reading technology must have at least a 99.9% success rate against the average normal, non-augmented human trying to fool it. e.g. you could ask the person "did you do this thing 5 years ago", and the machine is able to tell what the correct answer is, even if the human doesn't want it to.

The human does not have access to any external tools to fool it, like pricking themselves with a pin to change their stress levels.