“There will be a time very soon, like within the next 12 to 14 months, when because of devices like the one they and others are making, when you're going to be able to say, you know what, I want two hours of deep sleep. I want two hours of REM across a six hour night because I can't afford to sleep my ration of eight.”
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A commercially available sleep device exists that allows users to specify target amounts of deep sleep and REM sleep and demonstrably facilitates achieving those targets within a specified sleep window shorter than typical 8-hour sleep.
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