Evidence, evidence, evidence. Lots of people like to use this ill-defined and subjective concept to score points, as it allows people to sit in judgment, pronouncing whether or not some data are “evidence” or whether the evidence is “sufficient.” It’s quite the power-trip to sit in judgment not only of other people, but of Reality. Despite these problems, we cannot ignore the importance of evidence. For example, if we are to convict Jones for the murder of Smith, there had better be evidence to support this contention if we are going to take away Jones’s freedom.

Yet this very example serves to make both points. Yes, evidence is important when making decisions about our natural and social world, but relying solely on the evidence may very well deliver only a superficial, or even false, understanding of the world. We know this simply from the fact that in court rooms around the world, judges and juries have followed the evidence before them to determine guilty people are innocent and innocent people are guilty. This holds true even if we rule out corruption and biases.

Consider some movie where you, the viewer, know that Jones killed Smith, because you watched it happen. Jones, of course, subjectively knows that he killed Smith. The police investigator doesn’t know this, he simply believes that Jones killed Smith because of some clues. The investigator then privately confronts Jones and accuses him of murder. Jones, privately knowing the investigator is correct, simply replies, “There is no evidence and you can’t prove it” and the investigator knows this is true.

Right there, in that scene, we see the difference between evidence and truth. Relying solely on the evidence may very well deliver only a superficial, or even false, understanding of the world.