&gt;But say passing the test was a requirement to vote, wouldn&#x27;t the people who want to vote naturally proceed with studying for and taking the test, while those who don&#x27;t want to won&#x27;t be bothered since overcoming the obstacle is even greater than overcoming the resistance of mailing in a form or going to an actual booth?<p>The problem is that any such test with answers could be inherently biased against some groups.  &#x27;Do I feel like going to vote today&#x27; is not biased in such a way as the person taking the test is the creator of the test itself.<p>Imagine if there was a test to vote, but every person created their own test, answered their own test, and then scored their own test (and the test didn&#x27;t have to make sense to anyone, including the person who created&#x2F;took&#x2F;graded it).