For instance:

love to see it

I think struggling with this for a bit is a good way to learn the difference between instances of a class and class variables. On the other hand, I'm struggling to keep up with all the issues.

I think I'll keep it as is. If they have a hard time they can get your hint from discourse.

Haha why reinvent the wheel.

well golfed

Is there a formal proof why this is the case?

This kata should be renamed 'time machine stock billionaire' for more flare.

I don't understand, can you give an example.

Hold on how am i supposed to figure this out

How the heck did you come up with this??

TIL you can reference a previous argument in a default argument.

It is clear that negative should take precedence but yes, it should be made more clear.

Lots of typos. Description should read:

Just read that 4,153,237 people got married last year. Not to cause any trouble but shouldn't that be an even number?

Let's carefully check the number of people that got married last year. 
If it's an odd number, return "Not to cause any trouble but shouldn't that be an even number?"
If it's a negative number, return "Not to cause any trouble but shouldn't that be a positive number?"
If it's even and non-negative, return "Sounds fair"

Whoops my bad.

Ahhh the space-time tradeoff, except you lose both.