This solution surpassed all the concepts

IQ = 400

Kata was asking for XOR operator exclusively i believe.

feels good my solution is the same as the fist ranking solution

The other good option is Ellipsis.

so simple and clean

It worked fine when I ran the code. Are you sure you're not mistaken? Does the test give a list with [None] and is it a requirement?

Does not work when None is present, f.e. the list [None] as input won't work.

i like this one

First time have identical solution. I'm surprised best solution isn't oneliner (-:

I like it because it's not a one-liner haha

great minds think alike >.<