A car mechanic is employed by the defendant to repair cars and check that each repair works properly.…

Liable for every negligent act of an employee, even acts wholly outside the course of employment

Not liable because the mechanic was supposed to repair only and as such driving by him was outside his course of employment

Liable because driving was necessarily incidental to the duties of the mechanic since he was duty bound to check by driving whether the repair he had done were correctly done or not

Not liable because repairing and driving were two distinct acts, and the mechanic was not authorised to drive but was duty bound to repair only