Judges are experts on the law, not only as a matter of practice, but as a matter of principle. They know the law because they deal with it on a daily basis; they are also deemed to know the law because the law itself says so.
On January 12, 2015, the Court of Appeal rendered an important decision on abuse of process in appeal (Charland c. Lessard et al, 2015 QCCA 14).