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Physics, Astronomy & Cosmology / Re: Why do we have two high tides a day?
« on: 20/11/2018 18:47:09 »Definition of concept in English (Oxford dictionary).:Perhaps it is better the definition I´d previously seen on my Advanced Learners´s Oxford Dictionary (7th Edition):
NOUN
1 An abstract idea.
"An idea or a principle connected with something abstract"
And, again, not even in my wildest dreams could I have imagined I would have to explain, time and again, all that stuff (basic concepts from the realms of Physics, Maths, and even sheer Language) on a blog such as this one, supposedly for educated adults who learnt them when teenagers !!