1. She doesn't eat breakfast every day.

2. She never eats breakfast.
3. Sometimes she eats breakfast, and sometimes she doesn't eat breakfast.
[Does #1 mean #2 or #3?]

Yes, 1 and 2 mean the same thing.

3 is different because the idea of "never" is not there.

To determine whether statement #1 means #2 or #3, let's analyze the statements individually:

Statement #1: "She doesn't eat breakfast every day."
This statement suggests that she skips breakfast on some days, but it does not definitively imply whether she eats breakfast on other days. Therefore, it aligns more with the meaning of statement #3, where breakfast consumption is intermittent or variable.

Statement #2: "She never eats breakfast."
This statement implies that she never consumes breakfast, indicating a permanent absence of breakfast consumption. It doesn't allow for any exceptions or occasions where she might have breakfast. This meaning does not align with the statement #1.

Statement #3: "Sometimes she eats breakfast, and sometimes she doesn't eat breakfast."
This statement explicitly expresses that her breakfast consumption varies; some days she has breakfast, while other days she skips it. This aligns with the interpretation of statement #1.

So, statement #1 most closely matches the meaning of statement #3, suggesting that sometimes she eats breakfast, and sometimes she doesn't eat breakfast.