CONTROLLER AND CONTROL METHOD

The invention has a purpose of improving applicability of a controller and a control method to a vehicle, the controller and the control method executing brake control in which primary information is selectively supplemented by secondary information that is information on an assumed state related to connection and disconnection of a clutch. The invention includes: a determination section 5A1 that determines whether an actual state and the assumed state, which are related to the connection and the disconnection of the clutch, match each other in accordance with a temporal change in the secondary information; and a brake control section 5A4 that executes the brake control by using the primary information but not the secondary information in the case where the determination section 5A1 determines that the actual state and the assumed state do not match each other.