⊿ Point. {R} Glossary. ◢ Keyword: I. ▰ Sources. 〓 Books [B] ◥ University. {q} PhD. {tr} Training. {R} L' Review. [B] PhD. ⚫ USA. ↂ EndNote. ☝️ Machi (2016) Idea. Mental image or concept 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 an original idea can often lead to innovation. Etymology[edit] The word idea comes from Greek ἰδέα idea "form, pattern", from the root of ἰδεῖν idein, "to see History[edit] The argument over the underlying nature of ideas is opened by Plato, whose exposition of his theory of forms—which recurs and accumulates over the course of his many dialogs—appropriates and adds a new sense to the Greek word for things that are "seen" (re. εἶδος) that highlights those elements of perception which are encountered without material or objective reference available to the eyes (re. ἰδέα).
Plato advances the theory that perceived but immaterial objects of awareness constituted a realm of deathless forms or ideas from which the material world emanated. Philosophy[edit] Plato[edit] René Descartes[edit] John Locke[edit] C. Core Ideas.