Collective intelligence refers to the combined knowledge, skills and experience that emerge from collaboration between individuals. It is the foundation of economies where groups can achieve more than individuals alone. Examples of collective intelligence include Wikipedia, where many contributors build an online encyclopedia, and social networks that allow people with shared interests to connect. While sites like Wikipedia have grown rapidly with contributions from around the world, some argue they lack transparency, editing or fact-checking, making the information provided unreliable. There is debate around whether "the wisdom of crowds" can be truly trusted.