Premise: Sleep . Humans may suffer from various sleep disorders , including dyssomnias , such as insomnia , hypersomnia , narcolepsy , and sleep apnea ; parasomnias , such as sleepwalking and REM behavior disorder ; bruxism ; and circadian rhythm sleep disorders . Sleep apnea . As it disrupts normal sleep , those affected may experience sleepiness or feel tired during the day .
Hypothesis: Sleep is undisturbed by any forces.
Label: CONTRADICTION