1.   Few scholars, however, have ventured into the murky terrain of the prehuman past.

2.   Herewith, a clip-and-save road map for the murky verbal terrain ahead.

3.   Indeed, anyone trying to trace a path through the murky terrain of recent history will stumble over another embarrassing possibility.

4.   The latest investigation, however it turns out, casts yet another spotlight on the murky terrain where high-tech commerce and national-security issues intersect.

5.   This is murky terrain.