Further muddying matters, some researchers claim that the disorder is simply an extreme variant on an existing disease, pointing to similar, if smaller - scale, outbreaks of «disappearing disease» among bees that struck in the 1930s and 1970s, with
equal lack of explanation.
A
lack of requirement to provide an
explanation does not necessarily
equal a right to silence, because according to Re Tober Enterprises Ltd. and U.F.C.W. Local 1518 (1990), 7 C.L.R.B.R. a failure to rebut an employer's evidence
of wrongful conduct may be interpreted as a refusal to admit responsibility.