system
A chat on subreddit /r/PoliticalCompassMemes
human
Edit: swapped dumb with ignorant, user below correctly pointed out dumb and stupid are actually by definition the same thing.

I find people often confuse ignorant (lacking knowledge) and stupid. The difference between the two is the same as smart and intelligent. Someone who is an idiot cant put 2 and 2 together, they know all the right bits of information but always come to wrong conclusions. Someone who is dumb, is simply lacking the right bits of info but are otherwise capable of putting 2 and 2 together and will come to the right conclusions when presented with the info they need to be able to do so. 

Nothing wrong being a bit ignorant, everyone has topics they are ignorant about. There is a lot wrong with being stupid. 

I find this (anecdotally) is very true about people who work in construction or trades. They are not stupid people, they are actually quite intelligent. It's just that if a topic is outside of their job or personal interests they tend not to know anything about, simply because they dont really care to know. I have a lot of respect for these people as they are typically very hard workers and get shit done. it's also not a mindset I understand (logically I get it, but it's not a mindset i can get into) since I'm so painfully curious and have some innate need to understand.
gpt
Dumb and stupid are synonyms. They mean the same thing.

The word you're looking for is ignorant. Replace "dumb" in your comment with "ignorant" and it's spot on.