´My job is to get to the truth, ´ he said. ´I’ve been working at it for over twenty years. In that time I… and police science, have developed hundreds of techniques for helping us get to the provable truth. I’d like to be able to tell you it is now an exact science, that it is actually scientific, but I can’t, because, like economics, another so-called science, there are people involved and where people are involved there’s variability, unpredictability, ambivalence… Does that answer your concern, (…)? ´

The Blind Man of Seville, Robert Wilson