The binding legal principles established are: (1) An appeal is not moot or academic under section 21A of the Supreme Court Act where the respondent has not given an undertaking to cease the allegedly wrongful conduct, even if they claim to have voluntarily changed their practices. (2) To establish passing-off, a plaintiff must prove the 'classical trinity' of reputation (or goodwill), misrepresentation and damage. (3) Reputation in a trade name, even one containing descriptive elements, can be established through evidence of sustained business operations over time, substantial turnover and business scope, and market presence in a defined geographic area. (4) A descriptive word can acquire a secondary meaning when it becomes closely and distinctively associated with a particular business in the minds of the public. (5) Misrepresentation is established where a defendant adopts a name strikingly similar to the plaintiff's established trade name, removes distinguishing features, and offers similar services, thereby creating an inevitable likelihood of confusion in the minds of the public. (6) Trade names must be considered from visual, phonetic and ideological points of view, not side by side but as the public would encounter them with imperfect recollection, and in the context of all surrounding circumstances including the nature of the businesses and the ordinary purchaser's perspective.