A couple weeks ago I attended a festival that included performances and seminars. I made sure to watch the performance that included a bass player who also conducted a seminar. Without a doubt he's a terrific bass player, but as a teacher, he left a lot to be desired. It was a beginner class and as he started to explain the bass, he included explanations of other instruments. Odd I thought, but what really got me is when he asked, "When there's no drummer, who keeps the tempo?" Pretty much everyone said the bass. He replied, "Wrong, all the other instruments." Even though I only started playing bass 6 years ago after playing guitar for almost 50 years, my understanding in all that time, and said here many times, the bass is part of the rhythm section that keeps the tempo. I never heard another school of thought.