

The task of divining the true identity of these items is the purpose of another item, a special skill, or an NPC specializing in identification/appraisal/whatever-you-call-it.

In some Role Playing Games (and Roguelikes in specific), a Dungeon Crawling party may obtain items whose exact identities and purposes are a mystery at first - the characters don't automatically know what these items are supposed to be, and (more importantly) the game doesn't tell the player either it's labelled as an "unknown" or "unidentified" item or given an extremely generic descriptor like "a red potion" or " a scroll labelled 'FOOBIE BLETCH'" (as opposed to the usual "Healing Potion" or "Scroll of Fireball").
