Có phải từ "idea" trong câu này có nghĩa tương tự như "theory" đúng không?
Great question! In this case, you could use the word "theory" interchangeably with "idea". The meaning can be different in nuance, however, especially in a scientific context. "Idea" is a thought about the state of something, the relationship between multiple things or a course of action. "Theory", in a scientific context, has some experimental data to support it. A non-supported "theory" is called a "hypothesis", which is the scientific word for what we could casually call an "idea". In everyday speech, "theory" and "idea" can generally be used interchangeably except in cases where we describe a complex relationship, system or subject, it's preferable to use "theory" in those cases. In contrast, "idea" is preferred when describing a problem's solution that has just recently come up in the speaker's mind. Ex: Music theory is difficult but important if you want to get better at playing guitar. (subject) Ex: I have an idea, why don't we ask the professor if we can change the topic of our paper! (solution)
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