Art and Brian had eight and nine years' service, respectively, with the employer call centre and both had good work records. However, they were dismissed for cause after it was discovered that they had received about a dozen adult pornographic emails from a mutual friend. While they did not solicit or distribute the emails, the employer based the dismissals on breach of its computer use and harassment policy that, among other things, prohibited "accessing, transmitting, receiving, or storing discriminatory, profane, harassing, or defamatory information." The employer argued that it had done everything it could do to reinforce the importance of this policy: employees were required to read and sign off on it, they were reminded of it upon logging in; and they were made aware of the company's network monitoring system implemented to enforce compliance. Did the employer have just cause to dismiss Art and Brian? Explain your answer