title: What is open recursion?
body: <p>What is open recursion? Is it specific to OOP?</p>
  
  <p>(I came across this term in <a href="http://twitter.com/#!/djspiewak/status/70885262439366656" rel="noreferrer">this tweet</a> by <a href="http://twitter.com/#!/djspiewak" rel="noreferrer">Daniel Spiewak</a>.)</p>