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Plato, one of the first philosophers to discuss ideas in detail. Aristotle claims that many of Plato's views were Pythagorean in origin.

In philosophy, ideas are usually construed as mental representational images of some object. Ideas can also be abstract concepts that do not present as mental images.<ref name="Cambridge Dictionary of Philosophy">{{#invoke:citation/CS1|citation |CitationClass=book }}</ref> Many philosophers have considered ideas to be a fundamental ontological category of being. The capacity to create and understand the meaning of ideas is considered to be an essential and defining feature of human beings. In a popular sense, an idea arises in a reflexive, spontaneous manner, even without thinking or serious reflection, for example, when we talk about the idea of a person or a place. A new or original idea can often lead to innovation."<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Idea sections
Intro  Etymology  Innate and adventitious ideas  Philosophy  In anthropology and the social sciences  Semantics  Relationship of ideas to modern legal time- and scope-limited monopolies  See also  Notes  References  Bibliography  

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