It is possible to delete a Facebook account.

True: as of 2018-04-25, Facebook offered a way for users to permanently delete their accounts (not just deactivate them). Mostly true: deletion was possible but with significant caveats (a delay, or some data kept). Mostly false: only deactivation was available in practice. False: accounts could not be deleted.

Set before the research began.

1. E1 People are trying to leave Facebook. But it might not actually be possible The Independent · 23 March 2018

   “The act of deleting Facebook is relatively simple and easy, though perhaps slightly more complicated than it could be. But actually stopping using it, and removing yourself from the site entirely, is much more difficult.”

2. E2 People are trying to leave Facebook. But it might not actually be possible The Independent · 23 March 2018

   “There’s a less permanent way to leave, deactivation, which hides your profile from everyone but lets you return if you change your mind.”

3. E3 Facebook extends account deletion grace period to 30 days TechSpot · 4 October 2018

   “When opting to delete a Facebook account, it isn’t actually erased right away. Facebook offers a grace period designed to give people more time to make a “fully informed choice.” This grace period used to be 14 days but now, it is 30 days.”

In March 2018, The Independent described deleting a Facebook account as "relatively simple and easy" (E1). It treated deactivation as a separate, less permanent option (E2), so permanent deletion was available, not just deactivation. A later TechSpot report says deleted accounts were not erased right away: there was a grace period that "used to be 14 days" before it rose to 30 days (E3). E1 also says removing yourself from the site entirely is much harder. Because the criteria list a delay as a significant caveat, the claim fits "mostly true" rather than "true".