Maybe you've had this experience:  You are thinking about an acquaintance that you haven't thought about in a long time and at that moment the phone rings.  "What are the odds that it's Jerry?" you think to yourself.  And when it IS Jerry on the other line it seems somehow magical, amazing, beyond mere...

Evidence can be gained through a variety of means.  Just as you would wish to use a sensitive detector of particular frequencies of light if you are doing x-ray crystallography, and not, say, an acoustic detector, so too we need to develop and use detectors that are appropriate to the realm in which we...