However I question your absolute statement. What man can create, man can circumvent. (How's that for an absolute statement?)

Would you say that the people who created the test cannot game it?

You should also read upthread, what the actual psychologist said. It clarified my comment really well.

Oh come on. This was posted in a different comment:

http://www.physicschick.com/pole/2012xxxx/psych.txt

The following are very obviously the "correct" true or false answers to these questions from the MMPI-2:

  T * My mother is a good woman.
  F * Evil spirits possess me at times.
  F * There seems to be a lump in my throat much of the time.
  T * At times I feel like swearing.
  T * My hands and feet are usually warm enough.
  F * Ghosts or spirits can influence people for good or bad.
  F * Someone has been trying to poison me.
  F * Everything tastes the same.
  F * Someone has been trying to rob me.
  F * Bad words, often terrible words, come into my mind
      and I cannot get rid of them.
  F * Often I feel as if there is a tight band around my head.
  F * Peculiar odors come to me at times.
  F * My soul sometimes leaves my body.
  F * When a man is with a woman he is usually thinking
      about things related to her sex.
  F * I often feel as if things are not real.
  F * Someone has it in for me.
  F * My neck spots with red often.
  T * Once in awhile I laugh at a dirty joke.
  F * I hear strange things when I am alone.
  F * In walking I am very careful to step over sidewalk cracks.
  F * At one or more times in my life, I felt that someone
      was making me do things by hypnotizing me.

Again, I'll reiterate: can they be gamed? Yes. Is it likely? Emphatically, no.

Are you referring to the MMPI or something similar? Or to Unicru and Kenexa? Unicru seems to ask much more prosaic questions than MMPI.

And yes, when I speak of gaming, I am assuming prior knowledge and preparation - but not necessarily inside knowledge.