"maybe there is a chilling effect that prevents false statements" Or a chilling effect of unpopular opinions and facts. And a much harder climate to find out,

"maybe there is a chilling effect that prevents false statements" Or a chilling effect of unpopular opinions and facts. And a much harder climate to find out, what is a fact at all, if you have to be scared, that some government commitee strips you of your right to publish, if they do not like your results.