title: Using or in a while loop (Python)
body: <pre><code>variable1 = 0
  while variable1 != "1" or variable1 != "2" or variable1 != "3":
      variable1 = input ("Enter variable1: ")
  print("Succes")
  </code></pre>
  
  <p>My code never goes out of the while loop even if the variable is assigned 1 or 2 or 3.
  Am I missing something here or doing something wrong? I never read any documentation about Python that said or statements wouldn't work in while loops. According to propositional calculus this should be correct because True or False or False = True </p>
  
  <p>I am aware that I did not use integers by the way.</p>
  
  <p>Thanks in advance!</p>