I certainly can't explain them

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The Dutch mathematician Simon Stevin (1548-1620) included, amongst types of numbers, negative numbers, irrational numbers, and "inexplicable" numbers.

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  1. Andy6:59 PM

    Interesting. It took some searching, but it looks like he was referring to transcendental numbers.

    https://books.google.com/books?id=I38hBQAAQBAJ&pg=PA131&lpg=PA131&dq=inexplicable-numbers&source=bl&ots=TyIPE0NPx5&sig=w1paxEWi9SGbwUIQi8R7UadszX4&hl=en&sa=X&ei=BzWLVb3mKIr1oASZlIKwBw&ved=0CDkQ6AEwBg#v=onepage&q=inexplicable-numbers&f=false

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