Use OR/AND/NOR: I did not see John or/and/nor Peter

[Haytham]

Please advise the meaning of each of the following sentences:

1. I did not see John or Peter.
2. I did not see John and Peter.
3. I did not see John nor Peter.

[Yankee]

Welcome to the forum, Haytham.

1. I did not see John or Peter.
I did not see John individually. I did not see Peter (individually) either.

2. I did not see John and Peter.
John and Peter would have been together if I had seen them.

3. I did not see John nor Peter.
This sentence is grammatically incorrect. You could say:
I saw neither John nor Peter. --> This would have the same meaning as (1).

Amy