2/17 DESIGN FOR A BRAIN 



the relations between the five variables, sits at the panel and 

 applies the defined method. 



He starts by selecting a system at random, constructs its field 

 by S. 2/13, and deduces by S. 2/15 whether it is absolute. He 

 then tries another system. It is clear that he will eventually be 

 able to state, without using borrowed knowledge, that just three 

 systems are absolute : (v, w, x, y), {v, x\ and (w, y). He will add 

 that z is unpredictable. He has in fact identified the natural 

 relations existing in the ' machine '. He will also, at the end of 

 his investigation, be able to write down the differential equations 

 governing the systems (S. 19/20). Later, by using the method 

 of S. 14/6, he will be able to deduce that the four-variable system 

 really consists of two independent parts. 



References 



Eddington, A. S. The nature of the physical world. Cambridge, 1929 ; 



The philosophy of physical science. Cambridge, 1939. 

 Liddell, H. S., Anderson, O. D., Kotyuka, E., and Hartman, F. A. 



Effect of extract of adrenal cortex on experimental neurosis in sheep. 



Archives of Neurology and Psychiatry, 34, 973 ; 1935. 

 Temple, G. General principles of quantum theory. London. Second edition, 



1942. 



28 



