er-level
ontology then amounts to an insistence that all but one of these alternative
ways of thinking are wrong.' Any more than arguing that a law that says we
drive on the right side of the road, says that driving on the left side is
inherently wrong.

It seems to me that there are a number of possible different enterprises
here, let me characterise them as:
-	philosophical,
-	scientific/engineering, and
-	everyday.

It is true that the goal of some attempts in philosophy is to arrive at a
'right' answer 