Electrons may as well be <insert anything> as long as we cannot observe it. This is not interesting because the Occam's razor shaves it off instantly.
A much more tantalizing hypothesis (also unverifiable by construction) would be to assume presence of a metaphysical being which alters the probabilities of quantum processes ever so slightly as to have a macroscopic effect, but is careful enough to never do it for processes under direct experimental observation.
One can invent a number of such undetectable constructs, it's a good entertainment, and does show the limits of the scientific method. Practical applications of these are nil, though.
A much more tantalizing hypothesis (also unverifiable by construction) would be to assume presence of a metaphysical being which alters the probabilities of quantum processes ever so slightly as to have a macroscopic effect, but is careful enough to never do it for processes under direct experimental observation.
One can invent a number of such undetectable constructs, it's a good entertainment, and does show the limits of the scientific method. Practical applications of these are nil, though.