Facilitated communication has been called "the single most scientifically discredited intervention in all of developmental disabilities". Some promoters of the technique have claimed that FC cannot be clearly disproven because a testing environment might cause the subject to lose confidence. However, there is a scientific consensus that facilitated communication is not a valid communication technique, and its use is strongly discouraged by most speech and language disability professional organizations. There have been a large number of false abuse allegations made through facilitated communication.