CORRESPONDENCE, 1846-55. 197 



3, 4. Suit -identical and super-identical, complete content or 1846. 

 complete containing. Thus Londoner is a sub-identical of man, 

 man a super-identical of Londoner (man being itself a sub- 

 identical). The case in which the super-identical is the universe 

 may give rise to the extreme super-identical and its extreme case 

 of extreme identity. 



5, 6. Sub-contrary and super-contrary. The first complete 

 exclusion of one term from the other, both terms not filling up 

 the universe as (man being the universe) Englishman and 

 Frenchman. The second contrary overlapping, or where every- 

 thing in the universe is either one or the other, and some things 

 are both. As (terrestrial object being the universe) man and 

 irrational being, if madness and idiocy be included under irra- 

 tional. 



7. Mixed (what ought to be the name ?), where each term 

 has part in common with the other part not in common, and 

 both terms do not fill up the universe. The usual form of asser- 

 tion, as : Some animals are dark-coloured. I want the word 

 for mixed, and better ones for the others, if any. Mixed is : 

 Both have part in, part out, and there are which are neither. 

 There is no hope of a word for all this. Some word formed 

 to contain the idea of common part must do, and it should be 

 Latin like the rest. 



I tried an experiment yesterday with my daughter of 8^ years 

 old as to the ideas of necessity, and there was a dialogue as 

 follows : 



Q. If you let a stone go, what will happen ? 



A. It will fall, to be sure. 



Q. Always? 



A. Always. 



Q. How do you know ? 



A. I'm sure of it. 



Q. How are you sure of it ? Would it be true at the North 

 Pole, where nobody has been ? 



A. Oh yes, people have been to the North Pole, else how 

 could they know about the people who live there, and their 

 kissing with their noses ? 



Q. That's only near the North Pole. Nobody has ever been 

 at the Pole. 



A. Well, but there's the same ground there and the same air- 

 Hotter or colder can't make the air heavier so as to make it keep 



