&gt;Try incorporating some java code in a ruby project, however. No possible way that is going to fly.<p>I don&#x27;t think this example is convincing. There are too many languages to expect arbitrary pairings to combine well. (Not to mention the fact that googling &quot;java ruby&quot; returns JRuby, which apparently lets you do just what you describe.)<p>I do agree with your last point: Even when we look at similar languages, like Python and Ruby, we don&#x27;t declare one a winner, generally.