Wilful blindness arises where a person who has become aware of the need for some inquiry declines to make the inquiry because he does not wish to know the truth.
(R. v. Chang (2015), 2015 BCCA 62, 2015 CarswellBC 337,  B.C.J. No. 242 (B.C. C.A.) at para. 25 Goepel J.A. (Saunders and Levine JJ.A. concurring))