Quoting you:
‘No air or light can get into a closed mind. The next thing they’ll do is look up “co-” in another 10 dictionaries, going all the way back to 1838 or whenever.
‘They are obsessed, and we all know that obsessed people cannot see or hear anything outside their obsession. Talk about your vain repetition!’
= = =
My reply:
“Hmmmm ...”
Hmm is right! Pot calling kettle black?