﻿* 
* My conclusions:
< Parents and children are part of every family.
< 
* 
* My assumptions:
< A father is probably a person.
< A father is probably a parent.
< A parent is probably a person.
< 
* 
* My conclusions:
< Every parent is a woman or a man.
* 
* My assumptions:
< A mother is probably a person.
< A mother is probably a parent.
< 
* 
* My assumptions:
< A son is probably a person.
< A child is probably a person.
< 
* 
* My conclusions:
< Every child is a girl, a woman, a boy or a man.
* 
* My assumptions:
< A daughter is probably a person.
< 
* 
* My assumptions:
< Mary is probably not a parent.
< Mary has probably no child.
< 
! 
! This sentence is not accepted, because it is in conflict with:
< Mary is not a mother.
< 
