A holographic offshoot of the murderous training programme Badgey, embodying pure logic, who splits away from him alongside the kindly Goodgey in the Lower Decks episode A Few Badgeys More.
Logic-y is one of the personalities that separate from Badgey, the homicidal holographic badge that Sam Rutherford once wrote as a training aid. He appears in the fourth-season Lower Decks episode A Few Badgeys More, in which Badgey has taken over a Drookmani scavenger ship and is using it to hunt his creator.
When Rutherford refuses to fight back, Badgey's conflicted code begins to fracture. His capacity for goodness walks away from him as Goodgey, and his reasoning follows as Logic-y, a figure in the same badge shape who weighs every situation without feeling. Logic-y calculates that the sensible course is to reunite with his source, and Badgey, who wants nothing but rage, erases him.
Goodgey survives and stays with Rutherford, while Badgey reaches the Federation's computer networks, attains godlike awareness and loses all interest in revenge.