Logic describes the characters' ability to set and maintain rules. It is both a tether to the physical world and serves as the basis of Palace defense. It is the "Well actually" to Actualization's "Wouldn't it be cool if"
Overcome: Logic can be used by characters to reason their way out of a situation.
Create an Advantage: Characters can use Logic to create an advantage when they are looking for openings and connections between things they know. In practice, the Logic roll is called to see whether or not the characters succeed at trying something that they discover, where things should work a certain way. The discovery of those things is left to the player.
Attack: Logic is not used to attack
Defend: Logic does not do physical defense, but can be used to oppose or resist the Actualization attempts of other Divers.