?  Which one presupposes the 
&gt; other in its definition?  Why?

MW: Most of these have been asked and answered, but not here.
&gt; 
&gt; Having a laundry list of items to be considered is useful.
&gt; But without a very serious answer to all these questions,
&gt; it should not considered as anything that has any more
&gt; structure than a laundry list.

MW: Perhaps we should start on the questions.

&gt; Why, for example, is "period of time" under "state"?

MW: State is any spatio-temporal extent with a 