
      </ul>
    </li>
    <li> Correct functioning 
      <ul>
         <li> Correct initialisation during buildKernel (i.e. no result
              changes when buildKernel called repeatedly) </li>
         <li> Whether the kernels alters the data passed to it 
              (number of instances, instance order, instance weights, etc) </li>
      </ul>
    </li>
    <li> Degenerate cases 
      <ul>
         <li> building kernels with zero training instances </li>
         <li> all but one predictor attri