Summary: Obliviation is dangerous and shouldn't be performed lightly. Reversing it is possible but not without risk or cost to the patient. * Obliviation is mostly performed on Muggles, so the psychological costs aren't considered. * Oblivation can only be performed on a conscious mind. * Altered memories may be detectable, particularly when removed and viewed in a pensieve. When Obliviators are given time to prepare for a Memory charm, particularly on a wizard, they are skilled at crafting fabricated memories. * Obliviation removes memories but unless there's a specific stated memory implanted, doesn't inherently cover the missing memories with something else. * Obliviation is easier on certain kinds of minds and more difficult on others. Specifically, if someone has a h