One might argue that it is easier to see logical reasoning than value-based reasoning, even though in the end, both are value-based. For example, his father's reasoning amounted to "I don't like smoke in my car", which you can't attack any further, because it's a belief. In the case of logical reasoning, it would go something like this:
"I need to get out."
"Because it's quicker and more effective."
"And why is quick and effectiveness better?"
"Because one can achieve more."
"And why is achieving more rather than less better?"
And so on, and so forth, until the logical reasoner came to the conclusion that "I like furthering my own agenda" or "I like praise from others" or something like that, again, a belief which cannot be attacked further.