I was looking over a business plan for a software startup, and I was struck (more accurately, startled) by the fact that it did not mention “open source” anywhere.
Once I’d got past my surprise, I realized that I couldn’t immediately tell which of two explanations was correct:

  1. No reference to open source because the project was not going to involve any open source activities.
  2. No reference to open source because, well, OF COURSE they were doing open source – how could anyone assume anything else?