The question wasn't what is a science (that invites vagueness). My assertion is that math is not a science. Pretty easy to draw a line in the sand here.
The general nature of science is to study and observe the physical universe (and then use math to model what they see). The modelling accuracy is my premise for defining if it truly becomes a science. If the accuracy/predictability is < 50%, then it becomes a cult thing. Admittedly this is my definition - but that's the way a mathematical game works

Mathematicians do not study the universe per se. It's almost like (well it actually is) a game. Is monopoly a science? Chess? Of course not. What games do (and what mathematicians do) is make up a set of rules and play around within those rules. Some of those rules happen to be capable of a rough approximation useful in some applied sciences. But by no means is that the intent of a pure mathematician.
The obvious example here is actually DOOM - a pretend universe that serves no purpose for the "real world" (not counting that we enjoy playing it).
Because of the unknown nature of the universe, it turns out that physicisists are among the most creative mathematicians since they need to invent new models to explain what they see. This is a case of inventing a game to suit what they see being played out.
As I said, it's something that most applied mathematics professionals do not appreciate. I've had long personal discussions with engineers on this subject - usually not making any progress - since they get stuck on the amazingly good use of the math to solve problems.
If someone wants to debate this, please avoid personal insults and accusations. Give a lucid example why you think math is a "science". You can't just say "I think". If you use standard available resources you will not see the term math described as a science.