Unfortunately it doesn't work when people can't agree on definitions. For example, Wikipedia has lots of pages listing all entities of class X (all these list o

Unfortunately it doesn't work when people can't agree on definitions. For example, Wikipedia has lots of pages listing all entities of class X (all these list of pages). Who decides if an entity is of class X or not? In my opinion that would be decided by acclaimed experts on X. Wikipedians routinely disagree and will assign entities to class X of their own volition even if no support can be found among acclaimed experts. They will then challenge you to find a source claiming that the entity does NOT belong to class X, or else it should remain listed. That is of course almost always impossible because there aren't many experts out there spending their time publishing articles refuting Wikipedians misconceptions!