2 hours ago, haresfur said:First you say you know the etymology then argue about the description of an American Diner, based on etymology.
There is nothing contradictory about saying I know the etymology then sharing what I know about the etymology. I don't understand your comment, at all.
Yes I read both the Wikipedia and Smithsonian articles and neither of them give a source for their claims.
But I never argued in any way about constitutes a diner. I argued about the 'history' in those articles.