Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Evidence?

This book uses fictional stories. Fake people make tons of money in the stories using Navarro's strategies. Those fake people seriously know how to pick stocks.It's probably still worth reading, but I'm taking the advice in the review "dangerous." Why? Because I have absolutely no idea if his advice has ever worked for a real person. It seems far too large a commitment of time and mindset without much more evidence that it works.I'm starting to hunt down people who've tried it. So far, I've looked at Tobin Smith, who practices change wave investing. Apparently the guy's track record is dismal. So far so bad, but of course that's not enough to discredit the book.