title: Why does BEM often use two underscores instead of one for modifiers?
body: <p>In BEM, I understand that with modifiers, two dashes makes sense so that you can distinguish the modifier in <code>my-block-my-modifier</code> with <code>my-block--my-modifier</code>.</p>
  
  <p>But <strong>why use <code>block__element</code> instead of <code>block_element</code>?</strong></p>