In other words, neither treatment is considered superior. If it were known that one was superior to the other, the clinical trial would not be necessary. If during the course of a clinical trial it is discovered that the treatment in one arm is superior to the other arm or arms, the trial is stopped and patients in each are given the superior treatment. The computer chose MOPP for me. The answer is simple.
Clinical trials are the only road to progress in improving cancer treatment.
When cancer researchers come up with a new treatment, they must prove to their colleagues and to cancer patients that the new treatment is better or at least equal to existing treatments. The only way to prove it is to run a clinical trial to demonstrate how the new treatment fares when compared to the standard treatment. This road to progress in treating cancer is not a superhighway. It a rough, gravelly road filled with holes and barriers. I would like to outline some of the barriers.