power of the written word

perception of knowledge changes when it's written down 

most people probably think that it's safer to use a bicycle helmet when riding a bicycle 

and because of that many people often use bicycle helmets when riding bicycles 

but if media writes that it's safer to use bicycle helmet when riding a bicycle 

then more people will probably use bicycle helmets when riding bicycles 

and if blogs writes that it's safer to use bicycle helmets when riding bicycles

then even more people will probably use bicycle helmets when riding bicycles