title: Excel if or not returning expected result
body: <p>My spreadsheet looks like this, where each cell contains a formula bringing the value from another sheet:</p>
  <pre><code>N         O   ...  R     S     T      U
  Process   Loc      U1    U2    U3     IsValid
  Bestly    20       8     20    20     Invalid
  </code></pre>
  <p>Where the formula in U:</p>
  <pre><code>=IF(OR(O51=R51,O51=S51,O51=T51),&quot;Valid&quot;,&quot;Invalid&quot;)
  </code></pre>
  <p>It should have returned Valid, since 20 is in both columns S and T.  Is there something wrong with the formula that I need to fix to get it to return Valid when it finds the value in O in at least one column?</p>
  <p>Thanks! This is Excel in Office 16.</p>