Final answer:
An external force is required to set a stationary object in motion in outer space away from all gravitational influences and atmospheric friction.
Step-by-step explanation:
An external force is defined as a force generated outside the system of interest that acts on an object inside the system. Therefore, the statement 'An external force is required to set a stationary object in motion in outer space away from all gravitational influences and atmospheric friction' is True. In outer space, where there are no other forces acting on the object, an external force is necessary to overcome inertia and initiate motion.