There are unintended consequences, unwanted escalation, irrationality, misperception, and the security dilemma. Hendry attributed most of these to inexperience or misperception. Hallucinations are different from illusions and perceptual distortions, which are the misperception of external stimuli. Avidya represents fundamental ignorance, state Jones and Ryan, a misperception of the phenomenal world. These include&colon; psychophysiological, idiopathic insomnia, and sleep state misperception (paradoxical insomnia). Furthermore, rumination and poor coping resources may play a significant role in sleep misperception. This is a common misperception about the difference between inductive and deductive thinking. Sleep state misperception is classified as an intrinsic dyssomnia. The idea that all Buddhists, especially Sangha members, practice vegetarianism is a Western misperception. Misperception of patterns in random data is called pareidolia. This is, however, considered by linguists to be a misperception. Detecting sleep state misperception by objective means has been elusive. Ohala proposed a theory of sound change arising from the listener's misperception. Despite the common misperception, Mikimoto did not discover the process of pearl culture. Electrical brain stimulation to the VWFA causes reading-specific disruptions and can cause letter misperception.