"In an action conveniently described as a
negligence action the particular duty, a breach
of which is relied upon to establish negligence
on the part of the defendant, may be alleged to
have been transgressed in a variety of ways and
if the plaintiff particularises the transgression
or transgressions relied upon the defendant may,
subject to the discretion of the court, hold him
to the issue or issues of fact so raised. But
the action is still for a breach of the duty
specified and the defendant will not defeat the
plaintiff's claim either by establishing that the
plaintiff's injuries resulted from or were
consistent with some other breach of the same
duty. If the facts, as proved in the case, lead
to the conclusion that the injuries resulted
either from one or the other the plaintiff will
succeed. This view is implicit in the decision
in Doonan v. Beacham [1953] HCA 38; (1953) 87 CLR 346."
(emphasis added)