We are only discussing qualitative relations, not quantitative.
Examples of Qualitative relations :
- Batsman & Cricket – Batsman plays Cricket (case-based),
- Pen & paper – Pen writes on a Paper (associative),
- Having sex & having kids – Having sex leads to having kids (causal),
- Friday and Saturday – Friday comes before Saturday (sequential)
(A quantitative relationship is that between the area (A) of a circle and its radius (r), which is that
A = 3.14 * r^2. These are out of the scope).
Definitive Property : If two entities bear a relation between them, then their definitively representative aspects – text/videos/images – have something similar or in common. The converse is not true. There is no relation between 2 different kinds of adhesives (gum and Fevicol).
Similarities/Commonalities in the entities in the above examples :
1. A video/picture of cricket contains someone (lots of people) playing the game. Batsman’s definitive/identity is (contains him) playing cricket. Both the items contain a cricket player.
2. Both the videos/images – of a pen and paper in definitive action have both a pen and paper in them.
3. Both the videos/images – ‘having sex’ and of ‘having kid’ (here we are considering the ‘having of the kid’) involve a woman.
4. Both of their definitions involve a ‘day’. Both are days.
Note : “Relations” like 2 brothers, 2 sisters etc. don’t fall in this category, since, here, we are considering 2 entities, in general, (like say a pen and a paper in general OR a batsman and cricket in general etc.). We are talking about RELATIONS WHICH HOLD IN GENERAL between classes of samples. So a case like John Smith and Jack Smith (who are say each others’ brothers) don’t fall in this category of relations.