  This short technical note points out an erroneous claim about a new rule of
combination of basic belief assignments presented recently by Kenn et al. in
2023, referred as Kenn's rule of combination (or just as KRC for short). We
prove thanks a very simple counter-example that Kenn's rule is not associative.
Consequently, the results of the method proposed by Kenn et al. highly depends
on the ad-hoc sequential order chosen for the fusion process as proposed by the
authors. This serious problem casts in doubt the interest of this method and
its real ability to provide trustful results and to make good decisions to help
for precise breast cancer therapy.
