Usage of "Idea" and "Concept"

‘idea’ と ‘concept’の違いについて

◎ A concept is a general point derived from specific facts or theories. An idea is a thought, notion, opinion, or impression of what something is or should be like.

Concept: Temporal logic is based on the concept of time intervals.
Idea: Watching the birds fly, man got an idea to build a plane and conquer the skies.
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