He argues the point gravely.Sheep,it is clear,are not seen to be like because they often compose a flock,but are considered to be a flock because they are seen to be like.To do James Mill justice,he drops the argument as soon as he has struck it out.It is only worth notice as showing his aim.'Likeness'seems to imply a relation dependent on the ideas themselves;not purely external and arbitrary.If we could get rid of likeness,all association would ultimately be 'contiguity.''The fundamental law of association,'as he says elsewhere,59'is that when two things have been frequently found together,we never perceive or think of the one without thinking of the other.'The two ideas are associated as two balls are associated when they are in the same box.So far as they are themselves concerned,they might be separated without any alteration in their own properties.
What,then,corresponds to the 'box'?Association depends upon relations of time and space.Things are associated by occurring in succession or together;the red colour of a rose is in the same place with the shape of the leaf.The scent is perceived at the same time with the colour.The thunder follows the lightning.What,then,he might ask,are 'time'and 'space'?Are they 'ideas'or 'sensations'or qualities of the objects?or,in any case,as supplying the ultimate principle of association,do they not require investigation?Before coming to that problem,however,we have to settle other knotty points.We must clear away illusions which seem to introduce something more than association.Elements of thought not at first sight expressible simply in terms of sensations and ideas must be analysed to show that they are only disguises for different combinations of the facts.Reasoning,according to most logicians,supposes,first,concepts,and therefore some process of classification of the objects of thought;and,secondly,some process of combining these concepts to bring out hitherto unknown truths.What,then,is the meaning of the general or abstract symbols employed in the process?Mill's provision of raw materials consists so far of sensations and ideas,which are worked up so as to form 'clusters'(the word is taken from Hartley)and 'trains.'This corresponds to synchronous and successive associations.How does the logical terminology express these 'clusters'and 'trains'?Mill answers by a theory of 'naming.'
Language fulfils two purposes;it is required in order to make our ideas known to others;and in order to fix our own ideas.Ideas are fluctuating,transitory,and 'come into the mind unbidden.'We must catch and make a note of these shifting crowds of impalpable entities.We therefore put marks upon the ****** sensations or upon the 'clusters.'We ticket them as a tradesman tickets bundles of goods in his warehouse,and can refer to them for our own purposes or those of others.As the number of objects to be marked is enormous,as there are countless ideas and clusters and clusters of clusters of endless variety to be arranged in various ways,one main object of naming is economy.A single word has to be used to mark a great number of individuals.This will account for such general names as are represented by noun-substantives;man,horse,dog,and so forth.
Mill then proceeds,with the help of Horne Tooke,to explain the other grammatical forms.An adjective is another kind of noun ****** a cross division.Verbs,again,are adjectives marking other sets of facts,and enabling us to get rid of the necessity of using a new mark for every individual or conceivable combination into clusters.J.S.Mill remarks that this omits the special function of verbs --their 'employment in predication.'60James Mill,however,has his own view of 'predication.''Man'is a mark of John,Peter,Thomas,and the rest.When I say 'John is a man,'I mean that 'man is another mark to that idea of which John is a mark.'61I am then able to make a statement which will apply to all the individuals,and save the trouble of repeating the assertion about each.'Predication,'therefore,is simply a substitution of one name for another.So,for example,arithmetic is simply naming.What I call two and two,I also call four.
The series of thoughts in this case is merely 'a series of names applicable to the same thing and meaning the same thing.'62This doctrine,as J.S.Mill remarks,is derived from Hobbes,whom Leibniz in consequence called plus quam nominalis.63My belief that two and two make four explains why I give the same name to certain numbers;but the giving the name does not explain the belief.Meanwhile,if a class name be simply the mark which is put upon a bundle of things,we have got rid of a puzzle.
Mill triumphs over the unfortunate realists who held that a class meant a mysterious entity,existing somewhere apart from all the individuals in which it is embodied.There is really nothing mysterious;a name is first the mark of an individual,the individual corresponding to a 'cluster'or a set of '****** ideas,concreted into a complex idea.'64Then the name and the complex idea are associated reciprocally;each 'calls up'the other.The complex idea is 'associated'with other resembling ideas.