Using "no" at the end of a sentence

[anhnha]

From a thread in the forum:

Hello again!

Do the sentences below mean the same?

He often stuffs himself with sweets =? He often fills up on sweets.

Thank you.

They don't necessarily mean the same, no. The person in question might have a voracious appetite and be able to eat a huge quantity of food without feeling full. If he stuffs himself, then he eats a lot but we don't know for sure that he is full. In BrE at least, to "stuff yourself" simply means "to eat a large quantity". Bear in mind, though, that saying "I'm stuffed" means "I'm full. I don't think I could eat another thing".

In the above quote, I would like to know the function of the word "no".
Is there any difference in meaning between #1 and #2?

1. They don't necessarily mean the same, no.
2. No, they don't necessarily mean the same.

 

[Tdol]

The first is more colloquial and less direct IMO.

 

[anhnha]

Is #1 used in spoken English?

 

[5jj]

It is, yes.

 

[whitechalk]

Does the "no" in #1 reflect a firm or an emphasized "no"? The user/speaker uses a "don't" in the beginning.

 

[5jj]

Does the "no" in #1 reflects a firm or an emphasized "no"? The user/speaker uses a "don't" in the beginning.

Not necessarily, no. I see it as a one-word summary of the content of the preceding clause.

 

[Raymott]

It's common in speech here. I rarely see it in writing.
Maybe it's because I tend to write "No , ..." when someone asked me if something is right, and it isn't. Maybe it's less polite, but it's easier to understand.