"John might prefer apples to bananas, bananas to cherries, but cherries to apples."
- This tells the irrational nature of human decisions. Human preferences can't be assigned with ascending/descending values. 'a>b' and 'b>c' means that 'a>c' in mathematics, but not in Human Life. Human choices vary from person to person and for a person, from time to time. I read it on website of American Mathematical Society.