In State ex rel. Portage Lakes Edn. Assn OEA/NEA v. State Emp. Relations Bd., 95 Ohio St.3d 533, 2002 Ohio 2839, 769 N.E.2d 853, the Supreme Court of Ohio noted that the term "probable cause" is not defined in R.C. Chapter 4117. Ultimately, the court held that "SERB must issue a complaint and conduct a hearing on an unfair labor practice charge if, following an investigation, it has a reasonable ground to believe that an unfair labor practice has occurred." Id. at P38. In explaining SERB's role, the court in Portage Lakes noted that the issue of probable cause is essentially one of fact. As such, SERB considers not only the evidence supporting the allegations of the charge, but, also, any information that may rebut the charge or offer a defense to the violation alleged. "Issues such as managerial justification, the absence of protected activity by a charging party, or the failure to show any indication of unlawful motivation may be sufficient to secure dismissal of a case even when the facts alleged in the charge have been verified." Id. at P40.