Like the good med school professor that he is, he instructed me that "principles" are, in his world, based upon years of data, evidence, and analysis. If you don't adhere to a principle, you are liable for malpractice.
The pyramid of evolution of ideas goes from
- Suggestions
- Recommendations
- Guidelines
- Principles
Of course, Arnie just needs to wait to have his mind blown when I do my book review of "Fooled by Randomness" (coming soon), but that's another topic!