SUPERATIVE?

Use the definite article with both singular and plural superlatives.

The best runners

The most erroneous concepts

In your sentence, "It is a most erroneous concept," "most erroneous" is not a superlative.  "Most" is just an adjective, like "very."

Perhaps you knew that.  These/They are most/very erroneous concepts.   This is fine.

Best wishes,  - A.

Avangi

In your sentence, "It is a most erroneous concept," "most erroneous" is not a superlative.  "Most" is just an adjective, like "very."

 

Hi Avangi

There are various terms for things. Most grammarians call very an adverb when it is before an adjective: very good.

Many people call "a most erroneous concept" an absolute superlative. Native grammarians often say there is no such thing in English. I have always thought this is because the absolute superlative, which to my mind exists in English, is such a mess compared with other languages. Another reason may be that some native English grammarians don't have a knowledge of the grammatical structures of other languages and thus don't really have a clue what the absolute superlative consists in. I have dealt with the absolute superlative before. Anyone who is interested, will find it HERE.

Cheers, CB

Anonymous

Thank you Why one has an article and one doesn't?

The most erroneous concepts

 These/They are most/very erroneous concepts.  

Is the word  'most' here is not a superlative? When is it an adjective and when is it a superlative? 

He is the most handsome man I have ever met. 

First, let me call your attention to CB's correction.  "Very" is an adverb, not an adjective, and it probably always was. "Most" is an adjective when it modifies a noun (Most people can swim.), but in the two quite different usages we've been talking about here, it's an adverb.

1.  This is a most beautiful rose.  ("most beautiful" = "very beautiful",  singular rose,  indefinite article)
     These are most beautiful roses.  ("most beautiful" = "very beautiful,"  plural roses, no article)
     These are some most beautiful roses.  ("most beautiful" = "very beautiful,"  plural roses,  optional indefinite article)

2.  This is the most beautiful rose in the garden.  ("most beautiful" = superlative, singular rose,  definite article)
     These are two of the most beautiful roses in the garden.  ("most beautiful" = superlative, plural roses, definite article)

Please note that your examples, This is a most erroneous concept, and  These are most erroneous concepts  are of the first type, and are not superlatives.  You could say, These are some most erroneous concepts.  The "some" is optional.

Best wishes,  - A.

Avangi

Perhaps I should learn what "absolute" implies in this context    -     not relative?    That is, not compared to anything else?   I guess that would fit.

 

Your guess is correct, Avangi. The term "relative superlative" is rarely used even in Finland, but it does exist here. I suppose European grammarians think it's enough to distinguish the two superlatives if one of them has a modifier (absolute).

I think the development of the absolute superlative would have been different if there had been a Language Academy in England about 600 years ago. (There isn't one even now.) No doubt the members of the academy would have realized what a mess the absolute superlative was in English and would at least have tried to make some amendments. Nowadays the usage is too settled for anyone to do anything about it. The British have a dislike for such an academy, which just results from the fact that there never was one. Had there been one centuries ago, the British would embrace it today the way they go for other traditions. In France the equivalent academy did a good job of standardizing French spelling in the early days of the printing press.

Usage is interesting sometimes. People say: He was most kind. However, I don't think native speakers very often say: The performance was most great. Yet there is absolutely nothing ungrammatical in the sentence. We have "most" + a monosyllabic adjective in each sentence. In fact, the performance was most great is a sentence I might say because I am a kind of nonconformist who dislikes the idea that I should be restricted to the generally accepted phrases used by native speakers.

It is understandable that one can't change the rigid word order of English as there are hardly any inflections. One can play with some other features of the language, though.

CB