Dumb or not knowledgeable on the subject? I feel like back in the day it was easier to sound intelligent. You could read a thing, or look it up and you'd have some interesting facts that others may not know, which could make you sound intelligent. But now, anyone can access any information and fact-check any dumbass comment. It's really difficult for me to say anything with certainty anymore because there's a good chance I could be wrong and anyone can confirm for themselves.