“Scientists will discover a weak correlation between A and B, assuming C under D conditions. The university PR office will then post something for immediate release: ‘Scientists Find Potential Link Between A and B (under certain conditions)’. News organisations will pick it up and publish, ‘A causes B, say scientists’, which will then be read by The Internets and turned into ‘A causes B - ALL THE TIME!’ Which will then be picked up by TV shows that run stories like ‘A ... A Killer Among Us??’ All of this eventually leads to your grandma getting all weird about A.”