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The data also indicate that conspiracists were largely unwilling to apply the “conspiracy theory” label to their own beliefs and objected when others did so, lending support to the long-held suggestion that conspiracy belief carries a social stigma. Finally, conventionalist arguments tended to have a more hostile tone. These tendencies in persuasive communication can be understood as a reflection of an underlying conspiracist worldview in which the details of individual conspiracy theories are less important than a generalized rejection of official explanations.

Marijuana doesn’t increase risk of lung cancer, mental illness or death

Dr. Donald Tashkin, professor of medicine at University of California, Los Angeles, is among the foremost researchers studying the effects of marijuana on the lungs. His 2006 study, one of the largest to look at marijuana use and lung and upper-airway cancers, found that the “association of these cancers with marijuana, even long-term or heavy use, is not strong and may be below practically detectable limits.”

A larger, longer-term study published in 2012 by a separate group of researchers showed that marijuana had no detrimental effect on lung function. Tashkin, who was not involved in the study, called it “well conducted” and said the results confirmed his own findings.

First, it turns out there are segments of Facebook power users who contribute much more content than the typical user. Most Facebook users are moderately active over a one-month time period, so highly active power users skew the average. Second, these power users constitute about 20%-30% of Facebook users, but the striking thing is that there are different power users depending on the activity in question. One group of power users dominates friending activity. Another dominates ‘liking’ activity. And yet another dominates photo tagging.