The basis of torture is on fear and pain. This works on those who are weak and easy to break. But like other commenters said it is hard to tell lying and truth.

The basis of torture is on fear and pain. This works on those who are weak and easy to break. But like other commenters said it is hard to tell lying and truth. Sometimes, the person who finally speaks the truth doesn't even know if the information he/she has is even true.