Things that Go Bump in the Night

EJ:
There is no evidence of demons whatsoever.

SR:
Jeff, nothing could be further from the truth. As Bishop Berkeley pointed out, in the case of spiritual entities, which is to say, mental objects, esse is percipi--to be perceived to be a mental object is to be one. Therefore, the very fact that you and I (or either you or I) can meaningfully use the term “demons” proves with perfect logical certainty that demons exist.

Perhaps you meant to ask, can demons affect human life? But here the answer is just as simple and certain: if anyone believes they are demonically possessed, they are, ipso facto, demonically possessed.

There is, of course, a further crucial question: is there an objective spiritual realm, i.e., one that exists independently of anyone’s (or any one mortal's) perception of it?