Large groups of people are able to give very good prediction results; better than by experts. Various theory coming together give the better result in situation where different therories may apply.
The more we know to eliminate/exclude the more we know the real answer.
How to get a high ranking on google --> search engine optimization (links from other sides. many key words on the side. however risk to get 'banned' from google)
Google trends. what people google they do.
Social software. Collecting customer experience.
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