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               <li>Transactions are irreversible.</li>
               <li>Double spending is prevented by using a <a href="https://en.bitcoin.it/wiki/Block_chain">block chain</a>.</li>
               <li>Transactions are broadcasted within seconds and <a href="https://en.bitcoin.it/wiki/FAQ#Why_do_I_have_to_wait_10_minutes_before_I_can_spend_money_I_received.3F">verified within 10 to 60 minutes</a>.</li>
-              <li>Transactions can be received at any time regardless of wether your computer is turned on or off.</li>
+              <li>Transactions can be received at any time regardless of whether your computer is turned on or off.</li>
             </ul>
 
             <h2>Economic rules</h2>