How do you decide the best path to take to the truth? Does it depend on the circumstances? Are there exceptions where personal incentives are concerned? Do beliefs alter the approach to the question? Does the path vary depending on the outcome? How do you decide?
Here’s a simple graphic to describe the steps one needs to complete before declaring any health intervention as sufficiently valid to justify it’s use. The basic principle can be applied to many disparate processes.
Back of the envelope sanity check: