&gt; while open source is relatively unambiguous<p>In my experience both terms are ambiguous. Many people seem to believe that &quot;open source&quot; simply means the source is available for examination. For example:<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=3205771" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=3205771</a>