premise: Mike Bossy the Scoring Machine is a pinball machine manufactured by Game Plan, Inc. as a prototype in 1982, featuring New York Islanders hockey star Mike Bossy. There was only one machine produced. Designed by Ed Cebula, it was the only professionally endorsed pinball machine produced by Game Plan.
hypothesis: Mike Bossy the Scoring Machine is a pinball machine, it is a one of a kind machine which is pretty rare, since they only made the prototype
reason: there was only one machine made, so my statement was correct