It's wrong to do hurtful things towards others.
Holly gets in an argument with her classmate, Allison.
Holly wants to win the argument.
Holly counters Allison's argument with a valid point and evidence to back it up.
Holly personally attacks Allison when she can't think of a counterpoint in the argument to shut her down.
Allison considers Holly's argument and admits that it makes her see things differently.
Allison feels vulnerable and sad that she's been personally attacked.