title: When does Thread.sleep(1000) sleeps less than 1000 milliseconds?
body: <p>In this interesting article about <a href="http://infiniteundo.com/post/25509354022/more-falsehoods-programmers-believe-about-time-wisdom" rel="noreferrer">falsehoods programmers believe about time</a>, one of them is</p>
  
  <blockquote>
    <p>Thread.sleep(1000) sleeps for >= 1000 milliseconds.</p>
  </blockquote>
  
  <p>When isn't this true?</p>