During a recent Hacker News comment thread (<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10952335" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10952335</a>), I used a &quot;toy&quot; machine learning model, designed to guess a person&#x27;s age based on any fictional characters they can list in one sitting, to correctly predict the submitter&#x27;s age. Later in the same thread, the same model guessed another user&#x27;s age - 20 years too old! It got a lot of upvote activity, and it got me excited to revisit this side project.<p>I&#x27;m preparing to write up a post about the model, and would like to do some rewrites to improve its accuracy. I need your help!