@p number = 0: the person is @p @p number = 1: the person had an argument with @p @p number = 2: the person had an argument with a person who had an argument with @p @p number = 3: the person had an argument with a person who had an argument with a person who...
... @p number = n+1: the person had an argument with a person with the @p number equal to n
