true

You modified the original array at the line copyNumbers.splice(indexMin, 1).

The issue with your solution is that you're mutating the original array, even though the task requires you to avoid this. When you assign copyNumbers = numbers, you're creating a reference to the original array, not a copy. Modifying copyNumbers will therefore also modify numbers.

I meant read these docs: https://docs.codewars.com/training/troubleshooting#post-discourse

As for the link you asked, try this one

You will not find definitions of "positive" and "non-negative" in JS documentation, because these are not JS concepts, but mathematics. "Mathematically speaking" (at least w.r.t. what is, I believe, the most common interpretation), the set of non-negative numbers and positive numbers are not exactly the same, and they differ very slightly (by one element, to be precise).

There is no confirmation of your words in the JS documentation, I ask for a link.

Your code is wrong. Read the docs about how to post code in discourse, please.

non-negative integers is not the same as positive.

Quite annoying, but pretty fun

nice task, but nowhere near 8 kyu level. this should be a 6 at least...

Ignore letter case

not a kata issue. your code fails for e.g. "moOse"

There is nothing to fix (well, I restored a sample test in the description, someone messed it up, but that was a sample test too, so you should have seen it), neither in the description nor the tests, and I already explained what that means, bye.