title: How to name a function which decides if an action should be taken
body: <p>What is an appropriate/conventional way to name a function which takes a value, evaluates it against some criteria, and makes a decision if certain action should be taken or not?</p>
  <p>For example, a function that decides if a valve should be opened to water a plant:</p>
  <pre><code>def FUNCTION(soilMoisture: float) -&gt; bool:
      threshold = 0.1
      return soilMoisture &lt; threshold
  </code></pre>
  <p>A name like <code>openValve()</code> would be confusing, because this function does not open the valve, it only makes a decision.</p>