&gt; &gt; &gt; &gt; &gt; such as a person and that person's lifetime, which must
&gt; &gt; &gt; &gt; be thought of
&gt; &gt; &gt; &gt; &gt; &gt; as an occurrent. In general, if one is unsure how to
&gt; &gt; classify some
&gt; &gt; &gt; &gt; &gt; &gt; piece of a complex system, the safest strategy is to
&gt; &gt; treat it as
&gt; &gt; &gt; &gt; &gt; &gt; having both aspects and introduce them both into the
&gt; &gt; ontology, so
&gt; &gt; &gt; &gt; &gt; &gt; that enduring things always have lifetimes during