Assertion: insomnia's cause | /r/HasProperty | psychophysiological insomnia
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Source sentences:
text: Insomnia can also be classified according to its general causes: psychophysiological insomnia (the classic type, arising from to a variety of psychological and behavioral stressors and/or environmental and situational causes); paradoxical insomnia (genuine complaints of little or no sleep that are not corroborated by objective evidence of actual sleep disturbances); and idiopathic insomnia (persistent insomnia, usually beginning in childhood, which is unrelated to psychosocial stressors or medical disorders).