Whenever an idea seems so true that nobody can even think about challenging it without seeming like a fool, you can bet the idea is not true at all. Lies are made to seem true through concerted propaganda efforts by political and religious groups. These so-called truths are then used as a wedge for groups to impose their will on governments and people.
Below are some ideas that have been come to be seen by the public as unquestionable truths. In every case these truths are not based on research but on feelings that are so strong (and hysterical) that we are afraid to challenge them out of a fear of upsetting the group that imposes them on us.