In the UK we only really know of the word being a shortened form of "lunatic". When we use the word it therefore means more that the person is a tad...
Anyone can claim something impossible ;). However lack of empirical evidence is not generally sufficient to prove something impossible.
The only way...
I dispute that such things have to be considered as immaterial. It is an irrational leap to jump from "unknown mechanism" to "immaterial mechanism"....