Final answer:
The question's truthfulness about the performance of reinstated employees by an arbitrator cannot be ascertained without empirical evidence or specific studies. It is a Business-related inquiry in the field of human resources.
Step-by-step explanation:
The subject of the question regarding the performance of discharged employees who are reinstated by an arbitrator falls under the category of Business, particularly in the realm of human resources and labor relations. This area involves understanding how employees interact with their employers, the laws and policies governing employment, and the role arbitration plays in resolving workplace disputes.
The claim that a majority of discharged employees reinstated by an arbitrator perform their work in a below-average capacity following reinstatement is not universally accepted as fact and would require empirical evidence to support it. Therefore, without specific evidence or studies provided, one cannot categorically state whether the claim is true or false. This type of question would often be answered based on data gathered through research studies in the field of labor economics or human resource management.