On Fri, Jul 13, 2018 at 11:48 AM, Steven D'Aprano <st...@pearwood.info> wrote:
> On Fri, Jul 13, 2018 at 10:56:21AM +1000, Chris Angelico wrote:
>> You can say that about algorithms easily enough. My point is that this
>> ought to be a constraint on the function - implementations may choose
>> other algorithms, but they MUST follow one pattern or the other,
>> meaning that a Python script can depend on it without knowing the
>> implementation. Like guaranteeing that list.sort() is stable without
>> stipulating the actual sort algo used.
> I cannot imagine an algorithm that wasn't totally brain-dead (like "flip
> a coin") which could wrongly report a prime number as composite. Maybe
> I'm not imaginative enough :-)

Haha. Okay. I'm not familiar with every possible primality test, so I
had no idea that they ALL have the same failure mode :)

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