Editing Unwritten: System Reference Document/Game Basics (section)

==Fate Points==
Each character has a pool of fate points. Spending a fate point indicates that the character is doing something or being affected by something dramatically significant.

You can spend fate points to invoke an aspect or to activate certain powerful stunts. You earn fate points by accepting a compel on one of your aspects.

Each character has a refresh rate. Each session, a character’s pool of fate points will refill up to their refresh. Refresh is also used to buy additional stunts and resources as the character grows and changes.

===Declaring a Detail===
Sometimes, you want to add a detail that works to your character’s advantage in a scene. For example, you might use this to narrate a convenient coincidence, like retroactively having the right supplies for a certain job (“Of course I brought that along!”), showing up at a dramatically appropriate moment, or suggesting that you and the NPC you just met have mutual clients in common.

To do this, you’ll spend a fate point and justify your story details by relating them to your aspects. GMs, you have the right to veto any suggestions that seem out of scope or ask the player to revise them, especially if the rest of the group isn’t buying into it.