A 34-year-old male presents to your clinic with complaints of extreme thirst and frequent urination. He reports drinking over 8 liters of water daily but still feeling thirsty. Often, he craves cold water. His Symptoms began insidiously about a month ago and have progressively worsened. He is particularly worried about a seizure-like shaking he experienced this morning. He denies dysuria, hematuria, or changes in urine color. No fever, chills, or flank pain. He works as an office manager and has not noticed any significant weight loss or changes in appetite. As this patient described his frequent urination, you wondered whether he has polyuria. Polyuria is defined as which of the following in adults?
