"chapter" data-level="2.5.1" data-path="ch-research.html"><a href="ch-research.html#observation"><i class="fa fa-check"></i><b>2.5.1</b> observation</a></li>
<li class="chapter" data-level="2.5.2" data-path="ch-research.html"><a href="ch-research.html#induction"><i class="fa fa-check"></i><b>2.5.2</b> induction</a></li>
<li class="chapter" data-level="2.5.3" data-path="ch-research.html"><a href="ch-research.html#deduction"><i class="fa fa-check"></i><b>2.5.3</b> deduction</a></li>
<li class="chapter" data-l