ator cannot know that a negative number is impossible (in other words, you can't have -5 civilizations, for example).</p>
    <img src="images/alien.png" alt="An image of an alien and 0~450 next to it." loading="lazy">

    <h2>Other use cases</h2>
    <p>Here are some ideas of how to use this calculator and its notation.</p>
    <ul>
      <li>Estimate viability of a business idea, with uncertain size of the market, uncertain market share, uncertain monthly sales per person, and uncertain operational costs