Ignorance more often begets confidence than knowledge. — Charles Darwin
When we hear from self-proclaimed experts in their advice, take care to probe further to confirm their expertise has been applied to actual projects in your domain. Then confirm that the project is one where the person making the suggestion has accountability for the success of the cost, schedule, and technical performance.
Without accountability for success, the advice is just conjecture, usually an unsubstantiated conjecture.
I've encountered lately several self-proclaimed experts who don't actually work on projects but have lots of advice about how others should solve complex problems with their theoretical problem solving methods. Take care to confirm that theoretical advice is actually applicable to your problem, since it is unlikely those providing the advice will ever tell you - my advice, based on theories, is NOT applicable to your domain.
Their advice is usually a solution for a problem to solve - Caveat emptor
