I wonder why it is that Rramjet believes eyewitnesses are never mistaken in their recollections?
ETA: Actually, I don't think I ever got an answer to this hypothetical before, so I'll try again. Rramjet: suppose someone tells you that a man has been stabbed to death in your front room whilst you were out. On returning to your home, you can find no sign that anyone has entered since you left. There is no body in the front room. There is no trace of blood. Other people in the area did not see the murderer or the victim enter your home. Do you go with the lack of evidence and conclude there was no murder, or do you support the eyewitness?