Life is about trying to distinguish yourself from rocks and dirt. The less we are like rocks and dirt, the better we are for it. Society thinks less of people who are lazy, uneducated and unproductive. Rocks and dirt are all of those things: lazy minerals that get pissed on, shat in and stepped over. In short, they don't matter. They are matter, but don't matter, and that distinction is everything.
Science illiteracy makes us more like rocks and dirt. If you enumerated all of the things that make us human, there would be a subset of attributes that we share with rocks:
People who lack science literacy have more in common with rocks than people who don't.
Education and literacy in the arts and sciences are one of the precious few things that humans have that distinguish us from other things, let alone animals. One might argue, "humans move!" So what? So do pigs, sea slugs and snot. Basic locomotion isn't that impressive. Really, when it comes down to it, one of the only important things that separate us from other things, is our ability to infer. So I don't take it sitting down when some dipshit at a party brags about science illiteracy.
And when I talk about science, I mean real science. Not bullshit like "spirit science, economic science" and "creation science." That's where the scientific method comes in. Basically, if you can't apply the steps of the scientific method to your observation and hypothesis, it isn't a scientific hypothesis. If your beliefs aren't falsifiable, they aren't scientific and they probably belong to the realm of philosophy.
Here's how you can tell if you believe in bullshit: