A person commits the fallacy of missing the point when, while her premises do indeed support one conclusion, she draws a second, different, conclusion.
A statement leads to conclusion X, but conclusion Y is drawn.
This ad fr Prop. 8, “Where babies come from?"http://www.youtube.com/watch?v=75J3TN9Zzck commits the fallacy of missing the point.
The girl asks her father where babies come from. She says that her friend told her "it takes a Mommy and a Daddy to make a baby." The father, caught off guard, in fact, it takes a man and a woman to make a baby and that it not necessary to be married to have babies. Then the young girl becomes confused and questions, and, big eyes wide, asks, “then what is marriage for?”
The argument misses the point because the ad's premises -- it takes a mommy and a daddy to make a baby -- do not support either the intermediate or the final conclusion drawn: we shouldn't confuse our kids; vote Yes on Prop. 8 (outlaw same-sex marriage).
Argument A: Only mommies can have babies but with daddies. Conclusion is the purpose of marriage is to have babies. If a man and woman do not have to be married to have a baby, what is the purpose in marriage? Argument B is kids should not be confused. Conclusion is to protect the “real meaning of marriage."