Yeah, that would be very interesting to see what that can lead to.
i just showed what it can do
No, BEYOND THAT!
not really. you can use it to filter NaN values out of a list. i just cant see this being useful in any ways
...Well, not to be rude, but just because 1 person thinks something's not useful, doesn't mean it's not useful.
be my guest. if you think of some way this can be useful let me know 
Ok.
I need to set a variable to NaN because I'm doing things that involve... the very fabric of floating point numbers? I don't know how to explain it. What I have now works but takes 2 hours to do what I want it to.
no matter what a NaN will never = another NaN. it is the only value that is not = to itself
Weird.
well if you think about what NaN is it makes sense
...If NaN doesn't equal NaN, does Infinity = Infinity?
yes
...Ok, I thought because of different infinities, that it would be false.
infinity represents a number
Uh-oh.
This behavior took me by surprise. I would have thought that putting something in a variable or not never mattered; I'm always arguing with students who think they have to put some intermediate result in a variable instead of using composition of functions. As @ego-lay_atman-bay points out, we inherit this strange behavior from JS.
its good for testing and logging
Oh, that's good. No yapping about infinities.Huh, never knew that.