What is the current state of the law on the admissibility of lay opinion evidence?

Ontario, Canada


The following excerpt is from R. v. Rados, 2009 ONCJ 166 (CanLII):

In addition, the traditional view on the admissibility of lay opinion evidence has been modified by Dickson J. in Graat v. R. (1982), 1982 CanLII 33 (SCC), 31 C.R. (3d) 289 (S.C.C.), at p. 310, where he held that lay witnesses can present their observations as opinions where they "are merely giving a compendious statement of facts that are too subtle and too complicated to be narrated separately and distinctly."

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