What is the standard of review for a visa officer's decision?

The respondent cites the following passage from Lim v. Canada (Minister of Employment and Immigration) (1989), 29 F.T.R. 227, (upheld on appeal (1991), 121 N.R. 241), for the appropriate standard of review to be applied with respect tothe decision of a visa officer: To succeed, the applicant must do more than persuade me that I might have reached a different conclusion from the assessment. He must satisfy me that, as a result of an error in interpretation of the statute, the visa officer failed to carry out the assessment that was required of him, or in the alternative, in carrying out such an assessment, he failed in the duty of fairness to the applicant.