There's only one true invisibility cloak, and it's not enough to get someone out on its own. What reason to we have to suppose that the aurors or the designers of Azkaban ever bothered to consider the question of whether it would hide someone from dementors? The aurors were surprised that Bellatrix had vanished from the senses of the dementors, but this is clearly an unusual occurrence that should not arise within ordinary experience, so we should not be surprised at their surprise. They do not have "someone sneaked in with the true invisibility cloak" as a cached explanation to check for plausibility in this situation.
Given that we don't even know the approximate ages of either, Azkaban may even predate the true invisibility cloak's creation.
There's only one true invisibility cloak, and it's not enough to get someone out on its own.
Everything else needed to escape is readily available, given that people sneaking in with patronuses is a regular occurance. The owner of the cloak could easily have been sneaking someone out every few months.
What reason to we have to suppose that the aurors or the designers of Azkaban ever bothered to consider the question of whether it would hide someone from dementors?
The fact that no one in the story is supposed to be holding an idiot ball. The fact tha...
- This thread has run its course. You will find newer threads in the discussion section.
Another discussion thread - the fourth - has reached the (arbitrary?) 500 comments threshold, so it's time for a new thread for Eliezer Yudkowsky's widely-praised Harry Potter fanfic.
Most of the paratext and fan-made resources are listed on Mr. LessWrong's author page. There is also AdeleneDawner's collection of most of the previously-published Author's Notes.
Older threads: one, two, three, four. By tag.
Newer threads are in the Discussion section, starting from Part 6.
Spoiler policy as suggested by Unnamed and approved by Eliezer, me, and at least three other upmodders:
It would also be quite sensible and welcome to continue the practice of declaring at the top of your post which chapters you are about to discuss, especially for newly-published ones, so that people who haven't yet seen them can stop reading in time.