Are these signs?

[Mojavpa]

Let's break it down:

Just because someone cannot be explained scientifically
(which is what physiologists are for)
DOES NOT
mean
there are supernatural forces at work.

So, if the first one is true, is the second one, then?

Just because something cannot be explained scientifically does not necessarily mean there are supernatural forces at work. Maybe that is what Ghosttoker meant. If something can be be explained scientifically, it doesnt matter if there are supernatural forces at work because we already know the scientific explanation.