A lot of people I know are quick to admit they know nothing about Physics but hardly anyone will readily say they don't know English grammar. I'm sure I have looked into this before elsewhere in this blog. I most certainly have offended quite a lot of people when I call them 'grammar ignoramuses'. But they really are. Most people are ignorant of English grammar. That is a fact and I have given in this blog examples of cabinet ministers in the UK who were stumped by journalists' questions on simple English grammar and I have also mentioned the reason for this. In the 1960s, linguists very wrongly advised against teaching English grammar in schools and this advice was adopted all over the world where English was taught. Although they are now redressing this huge mistake in the UK by reintroducing grammar in schools, it is not wrong to say that most English-speaking adults today are grammar ignoramuses.
But unlike Physics ignoramuses who do not profess a knowledge in Physics, let alone pretend to teach anyone Physics , grammar ignoramuses really believe they are grammar experts. I used to think they were dishonest but I am fairly certain now that it's a kind of benign mental state that makes a person believe he has a vast knowledge in grammar when he is really utterly ignorant of it. They are honest but they are ignorant and they don't even know that.
You can see this in Quora, an internet-based forum where people ask questions and those who think they know the answers give their response. I have mentioned Frank Dauenhauer before in this blog post: Query Quora. That Frank knows nothing about English grammar is obvious. He can't even get his part of speech right and that's kindergarten-level grammar. Here's what he posted on Quora slightly more than a week ago in response to the simple question, 'Is it "I feel bad" or "I feel badly"?':