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why expert evidence is preferable: "first, specialized areas of practice are becoming
more common; second, once appointed, judges become quickly removed from day-
to-day details of practice; and third, judges cannot be cross-examined on their
opinion." The underlying rationale in respect of the last factor was explained by the
British Columbia Court of Appeal in Zink v. Adrian, 2005 BCCA 93 at para 44,
[2005] 4 WWR 420: "... the expert witness can be cross-examined with a view to
showing he knows not whereof he speaks. But the parties have no means of
discrediting a judge's implicit assertion that he knows the proper way to conduct a
certain kind of legal business."
17 In Tran v. Kerr, 2014 ABCA 350, [2015] 1 WWR 70, the Alberta Court of
Appeal held that the trial judge erred by applying a standard of care based, not on
expert opinion evidence, but on his own experience as a former real estate lawyer.
At para. 23, the Court of Appeal held that judges can take judicial notice of the
standard of care, "... in cases where the court collectively (and not just individual
judges on the court) could make a finding of the standard of care without the
assistance of expert evidence" and, even then, "[j]udicial notice can only be taken
of facts that are notorious and undebatable."
18 It has also been held that expert opinion evidence in professional negligence
actions is not necessary where "the impugned actions of the defendant are so
egregious that it is obvious that his or her conduct has fallen short of the standard
of care, even without knowing precisely the parameters of that standard"
(Krawchuk v Scherbak, 2011 ONCA 352 at para 135, 106 OR (3d) 598).
[274] Justice DuFour continued:
19 Whether the conduct of the lawyer was clearly egregious or whether the facts
are notorious and undebatable or whether all or only few members of the court
might have the ability to divine the standard can be relevant factors to consider, but,
in my view, they are but factors that fit into a larger matrix. Here, I have found
guidance by referring to the established doctrine of the admissibility of expert
opinion, concepts of basic fairness, the reputation of the administration of justice
and access to justice.
20 First, admissibility as set out in R v Mohan, [1994] 2 SCR 9. Two of the four
tests for admissibility established by the Supreme Court are relevant to this
discussion - that the opinion be proffered by a properly qualified expert and the
necessity of the opinion in assisting the trier of fact.
21 In my view, it is anathema to the judge's role as a finder of fact to self-declare
oneself to be an expert, eschewing the safeguards that accompany a proper inquiry
into qualifications: direct examination and cross-examination. Judges, whether or
not they feel personally qualified to divine the standard of care to be applied, ought
to tread cautiously before entering too far into the fray.
22 Then, necessity. In Malton, at para. 165, the court asked "whether an expert,
presumably a lawyer, can tell me anything that I do not already know about