Is the ‘which’ in

Proposition 25 suggests a better definition of m-reducibility than given in Definition 23, which is also the one typically given in texts

ambiguous? It is a line from an article I’ve written, and the anonymous referee claims that

the reader has to guess to which of the two definitions the “that” at the beginning of the line refers to.

This seems to me, however, that the which should refer to the definition immediately preceding it, since if I wanted it to refer to the other, I’d written something like Proposition

25 suggests a better definition of m-reducibility, which is also the one typically given in texts, than given in Definition 23.

As the title suggests, this is essentially a question about whether ‘which’ by default refers to the noun closest to it.