The theory of control systems leaves room for systems with both feedforward pathways and feedback elements or pathways. The terms 'feedforward' and 'feedback' refer to elements or paths within a system, not to a system as a whole.
Control systems theory permits the presence of both forward-acting and feedback mechanisms within a system. The terms 'feedforward' and 'feedback' are used to describe elements or pathways within the system, not the system as a whole.