This coming from a field in which we don't even know if a spirit really exists or not.
As for the living human element, I'm beginning to wonder about the effects humans can have on the device. Let me elaborate a little on this. A few weeks ago I took this device to a non paranormal place to see what the human effects were on this device. When I turned it on, it babbled away (tophat, stars, cake) really random stuff like normal. that was until two guys started playing a miniatures game catty corner to us. when they started to declare attacks and combat the ovilus shifted. focusing on a really tight niche of words (Shoot, Attack, Violence, Kill) when they finished it went back to it's randomness again. While most would blow it off I paid closer attention to it. Again it was random until the two guys got into the combat phase of their game and it swung around again to those words. Then backed off to complete randomness when they finished.
According to science we give off no magnetic field. Yet the device seemed to react to something. As for the store, I've checked for stray emf fields in the big open space. There is no reason why the device acted they way it did. I'm not saying it's perfect or the end all that the device, however it's a start. Maybe instead of focusing on "What's possible" or "What's Impossible" on a subject matter that science still considers impossible. We should focus on pursuing new lines of thought for this subject.
I would have no problem with someone taking something like this and doing a study on it. If in fact the Ovilus responds in the manner so stated here it appears that (a) something repeatable is going on, and (

an experiment should be able to be designed to replicate it under controlled conditions.
For instance if we assume that it happens exactly as stated we know certain things must be responsible. For one, the Ovilus responds to EM Fields, that's how it's designed. We also know there are ways to monitor such fields and detect changes in them. So it would seem an experiment, whereby an Ovilus is set up in close proximity to those who can affect it should produce some form of change in EM Fields. If that change is detected by an Ovilus, it would also be detected by other EMF devices as well, including possibly an EEG machine. So the experiment is obvious, set up and not only detect the field, but learn about the nature of the field as well.