But they aren't really advocating argument from authority e.g. > Be careful though: not everything from evangelists will apply to your specific problem. Don’t

But they aren't really advocating argument from authority e.g. > Be careful though: not everything from evangelists will apply to your specific problem. Don’t invoke the Single Responsibility Principle spell without any argument why it’s useful and valid. Opinion leaders should provide you these concrete arguments; if they don’t, their names alone shouldn’t influence your decisions.