When assessing passing off by imitation of get-up, the court must consider the perspective of an average purchaser who has a general idea of what they seek but not exact recollection, may not see products side-by-side, will not be alerted to fine distinctions, and may be illiterate. While some copying is permissible, a party who copies escapes liability only if they make it "perfectly clear" to the public that the articles being sold are not the other manufacturer's products, such that there is no probability of deception of an ordinary purchaser. Evidence of fraudulent intent and deliberate imitation, while not essential elements of passing off, is highly relevant - if it is shown that a defendant deliberately sought to take advantage of plaintiff's goodwill, the court will not be astute to say he cannot succeed in doing what he is straining every nerve to do. Where substantial overall similarity exists in get-up (colours, arrangement, lettering) and the distinguishing word marks are themselves confusingly similar or rendered inconspicuous, passing off is established when combined with proof of reputation and likelihood of deception. Unlawful competition cannot be used as an alternative cause of action to create passing off with requirements less exacting than those required by common law.