title: Multiple conditions for ng-disabled
body: <p>I have the following table with 3 checkboxes. I assigned each one its own model.</p>
  
  <p>I have a button which I want to be disabled unless any one of the 3 checkbox models are true.</p>
  
  <p>However I'm confused since I expected to use </p>
  
  <p><code>&lt;button " ng-disabled="!mt0 || !mt1 || !mt2"&gt;Reassign&lt;/button&gt;</code></p>
  
  <p>since if <strong>any</strong> of those were to be true the button should not be disabled.</p>
  
  <p>However, the <em>opposite</em> worked:</p>
  
  <p><code>&lt;button  ng-disabled="!mt0 &amp;&amp; !mt1 &amp;&amp; !mt2"&gt;Reassign&lt;/button&gt;</code></p>
  
  <p>Why?</p>
  
  <p>See plnkr here: <a href="http://plnkr.co/edit/yURa3g0aNjDyfEvjK2D0?p=preview" rel="noreferrer">http://plnkr.co/edit/yURa3g0aNjDyfEvjK2D0?p=preview</a></p>