You didn't add the major story elements we recommended. Study the comments above, and perhaps other posts on this site, to get a better understanding of what we're talking about.

In short, a logline needs to describe a plot. A plot is a sequence of events that starts at the inciting incident and ends with a goal. "...an altercation with his father..." could be an inciting incident, but in this case it isn't directly related to his goal (which is also too vague to count as a goal by the way), that makes it not part of the same sequence of events - in other words, this isn't a very good inciting incident.

What does "...find a new life..." mean in rpractical terms? A new house? New friends? Be more specific.

Consider Nemo, after a little argument with his father he's whisked away, by accident, far from his home. The inciting incident was not the argument with his father but getting lost was. As a result of getting lost, his father had to go on a quest -- all together now -- Finding Nemo.

As a revision:

After an altercation with his father, an outcast sea snail goes against his predatorial upbringing to find a new life with his biological rivals; the soldier crabs.

Is this addition making the logline stronger or weaker?

Thanks so much for everyone's feedback.

You might need a goal an and obstacle. But wil high concept loglines that sometimes isn?t needed.

The winner of a recent Logline competition was ?A man clones his wife so he can fall in love with her again?.