[Gen. Burkhalter]

Generally, demonic possession is characterized by these traits:

1) The person has superhuman strength
2) The person has a strong adverse reaction to religious symbols.
3) The person speaks in languages not previously known to him
4) The person expresses a strong knowledge of complex subjects not previously known to him.

[MarkBsnr]

Generally, demonic possession is characterized by these traits:

2) The person has a strong adverse reaction to religious symbols.

The Iconoclasts of the first millennium, the last, and the current one come to mind.

[GOPJ]

Interesting - thanks for sharing.

1) The person has superhuman strength
2) The person has a strong adverse reaction to religious symbols.
3) The person speaks in languages not previously known to him
4) The person expresses a strong knowledge of complex subjects not previously known to him.