Politics is informed by data, but it's not a science. There is no "right" answer (though arguably a lot of wrong ones).
Think of stuff that programmers do argue about. Type systems, databases, architecture, agile development, etc.
Logic is a great tool, but it's also more limited than people realize.
I'm not big into politics but I don't really understand how two different parties can both use "science and data" to reach totally separate conclusions. Which one is lying/wrong?
As a programmer, it just doesn't compute. Input and output and all that.