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TeacherJapan Posted 10 years ago
Grammar

how to use "and" and "or"

I am always confused about how to decide which to use. Could you help me with the following sentence?

Some people used to say that taking a certain medicine would increase the level of intelligence and/or that a certain food would impove the working of brain function.

Could you kindly tell me what difference it makes?
  

Top answer

My impression is that "or" has a nuance that people may have said other things too in similar vein, whereas "and" feels more "exact" and "complete". "the working of brain function" doesn't seem quite right to me.

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2 Answers
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My impression is that "or" has a nuance that people may have said other things too in similar vein, whereas "and" feels more "exact" and "complete".

"the working of brain function" doesn't seem quite right to me.
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Oh, the working of the brain!! Thank you very much for pointing that out! Your explanation of the difference between "and" and "so" is also easy to understand:¥