some vs. certain

[color=red]a. He had not been informed that I had seen some of the photos.

b. He had not been informed that I had seen some of the photos.

Which means

  1. He was not aware that I had seen any of the photos
    and which means
  2. There were certain specific photos that I had seen and he had not been informed of that. Maybe he had been informed that I had seen certain other photos.
    ?

Many thanks.

Both the sentences are the same!

This means exactly what it says - he’s not aware that you’ve some of the photos. You shouldn’t read any more into it than that.

There is nothing to indicate which photos you have seen and there’s nothing to indicate whether he knows you’ve seen others.

Thank you Beeesneees and sorry about the mistake.

a. He had not been informed that I had seen some of the photos.

b. He had not been informed that I had seen certain of the photos.

?

The question is: which could be used if he had been informed that I had seen some of them? He knew I had seen some of them, but he did not know that I had seen certain others.

Many thanks.

a. He had not been informed that I had seen some of the photos.

b. He had not been informed that I had seen certain of the photos.

Neither could be used to definitely carry that meaning.

He had not been informed that I had seen a certain selection of the photos.
comers closer, as it does somewhat imply that you had seen others, but it is not 100% definite. It can still mean you haven’t seen any.
You would have to preface the sentence with something like
Although he knew I had seen a number of them, he had not been informed that I had seen certain photos.

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