is a quote attributed to esteemed computer scientist Alan Kay. Perspective is one of the largest benefits an entrepreneur receives from mentoring. Team mentoring, which is the standard practice of the MIT Venture Mentoring Service, is especially effective in providing a different perspective from each member of the mentoring team, which can include two or more mentors.
In addition to providing varying viewpoints, types of expertise and experiences to the entrepreneurs, the mentoring team learns from each other, and thus improves their mentoring. Having mentored at a member of a team at MIT VMS and as an individual elsewhere I would say the team approach is at least an order of magnitude more effective, and more fun for both mentors and entrepreneurs.