Hola Jesús!
If you know the "ins & outs" of something, you know how to make it work/ function such as, Computers, Cars...etc.
"Ins & Outs" means the detailed fact, the function or the mechanism of something.
Hope it helps!
Billy
28 janvier 2017
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Ins and outs mean all the details. So this sentence means "I don't know all the details of the matter."
28 janvier 2017
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It just means details. Imagine knowing something so well that you know the inside of it and the outside of it. Then you would know the "ins and outs" of it.
28 janvier 2017
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