In the text, they made it clear that the vow was based on the meaning of the words and not the words itself. V said that it was important that everyone understood the meaning.
Harry would not consider star lifting or terraforming or the creation of a virtual world at the expense of the actual one to be 'destroying the world'. He would considering 'destroying the world' to mean 'the ending of all life' or somesuch.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 119.
Plans for next chapter release:
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)