title: Is there anything wrong with using T & F instead of TRUE & FALSE?
body: <p>I noticed that using <code>T</code> and <code>F</code> instead of <code>TRUE</code> and <code>FALSE</code> in functions in R gives me the same results. Of course, <code>T</code> and <code>F</code> are more concise, yet, I see <code>TRUE</code> and <code>FALSE</code> being used more often. </p>
  
  <p>I was wondering whether there is any difference between the two? Is there anything wrong with using <code>T</code> and <code>F</code>?</p>