Question

"A mother beats up her daughter because she was drunk" who was drunk?

Answer 1

She was drunk and noone else. As far as i think the daughter had drunk because there would be comma after daughter which would denote mother.

Answer 2

A mother beats up her daughter because she was drunk:

This sentence clearly is ambiguous as it is not clear to whom is “she” referred to. It might be referred to the mother or the daughter.

The first scenario can be that the mother beat the daughter because the mother was drunk while in other case the daughter might have been drunk so the mother beat her up.

It can’t be told, to whom is the pronoun “she” referred to in this sentence. It is the case of ambiguity. Ambiguity is a situation in which one sentence can be interpreted in different ways.