A reply to Jerry's ope-l 2786.
Sorry.  I guess I've bent the stick too far in the other direction and made my 
sarcasm too subtle.  Certainly there's a difference between modifying and 
negating conclusions; that was the point I was trying to make.  
For instance, in Marx's account of the transformation, the determination of 
profit by surplus-labor-time, and of value received by living labor-time, is 
negated at the level of the individual capital, but re-confirmed at the level 
of the total social capital.  The "law of value" is thus only "modified," not 
"negated," because it does manifest itself.  In "transformation problem" 
"solutions" (of the two-system, "dualist" variety), it is negated.  Total 
price doesn't equal total value and/or total profit doesn't equal total 
surplus-value.  The discrepancies can't be accounted for consistently on the 
basis of the law of value.  Shaikh tried, but in 1987 Glick and Erhbar showed 
that his explanation was incorrect.
To account for these discrepancies by saying that values and prices "exist" on 
two different "levels of abstraction," I think both Michael W. and I agree, is 
illegitimate.  As Hegel says, essence must appear, and if it doesn't, then it 
ain't essence.  The point is important because Hegel rejects the Cartesian 
search for a certain starting-point for knowledge.  He (Hegel) say this is 
trying to know before you know.  So for Hegel the starting-point is a 
presupposed one.  Yet, he reaffirms the standpoint of speculative philosophy, 
vs. dogmatism as well as empiricism, that philosophy cannot take its 
categories as given.  This contradiction he resolves by arguing that the 
results must justifying the presupposition.  Marx does something extremely 
similar (if not indeed the same) with the law of value, and with the circuit 
of capital).  Hence, without demonstration that essence appears, a claim 
concerning essence is "unproved" and dogmatic. 
Andrew