They are also used to immobilize the ankle and lower leg in the presence of arthritis or fracture, and to correct foot drop; an AFO is also known as a foot-drop brace. Ankle-foot orthoses are the most commonly used orthoses, making up about 26% of all orthoses provided in the United States.
adjective. noun. Fundamental is defined as something that is basic or essential. The most basic underlying truth of a religion is an example of a fundamental truth. The definition of fundamental is a basic truth or law. Freedom is an example of a fundamental of the American ideal.
The basic message of Christianity is termed the truth,  and believers know the truth, and can discern that no lie is of the truth ( 1 John 2:4 1 John 2:21). Believers are to love in both deed and in truth (i.e., truly 1 John 3:18).