(1) These rules regarding proof of unlawful discrimination are intended to provide general statements of what must be proved to establish unlawful discrimination in various kinds of complaints. They are not intended to be exhaustive statements of the applicable law, but general guidelines and informational summaries of the law. Practitioners appearing in cases before the department or commission should also refer to the statutes, the balance of the commission's rules, the department's rules, and the federal, state, commission and department decisions addressing the issues in their particular cases.