Here’s today’s example of why:
Up until a week ago, here is something you could have learned from Wikipedia:
From 1640 to 1641 the might of colonial Portugal clashed with India’s massive Maratha Empire in an undeclared war that would later be known as the Bicholim Conflict. Named after the northern Indian region where most of the fighting took place, the conflict ended with a peace treaty that would later help cement Goa as an independent Indian state.
Except none of this ever actually happened. The Bicholim Conflict is a figment of a creative Wikipedian’s imagination. It’s a huge, laborious, 4,500 word hoax. And it fooled Wikipedia editors for more than 5 years.