In Salewski v. Lalonde, the Court of Appeal casts doubt on whether there is any circumstance where r. 21.01(1)(a) is appropriate for determining a limitations issue except where pleadings have closed and the facts are undisputed:
 However, the basic limitation period established by the Limitations Act, 2002 is now premised on the discoverability rule. The discoverability rule raises issues of mixed fact and law: Longo v. MacLaren Art Centre, 2014 ONCA 526 (CanLII), 323 O.A.C. 246, at para. 38. We therefore question whether there is now any circumstance in which a limitation issue under the Act can properly be determined under rule 21.01(1)(a) unless pleadings are closed and it is clear the facts are undisputed. Absent such circumstances, we are sceptical that any proposed limitation defence under the Act will involve “a question of law raised by a pleading” as required under rule 21.01(1)(a).