Whenever I'm showing symptoms of sleep deprivation my SO, who at a certain point in her life spent a few weeks helping a young man regain basic communication sk

Whenever I'm showing symptoms of sleep deprivation my SO, who at a certain point in her life spent a few weeks helping a young man regain basic communication skills after a stroke, asks me if I'm having one at the moment. One sign, which I observed in a few other sleep-deprived people as well, is the inability to form a coherent sentence - or even say a single word sometimes.