Columnist: Even if the primary purpose of university education is to make students employable, such education should emphasize the liberal arts rather than the more narrow kind of technical training that prepares one for a particular sort of job.
Conclusion (should = opinion)
University education should emphasize the liberal arts rather than the more narrow kind of technical training that prepares one for a particular sort of job.
Evidence (this is because)
The reasoning skills one acquires from a liberal arts education allow one to adapt to new intellectual challenges and thus to perform jobs for which one has received no specialized training.
Evaluate
How would an opponent push back at this argument and argue that we shouldn't emphasize liberal arts?
Maybe he would say that the primary purpose of university education is to make students employable, and they're much more employable if they have a narrow kind of technical training.
He could argue that most jobs don't need people who can adapt to new intellectual challenges; they need people with narrow technical expertise.
Goal
To strengthen the argument we could try to rule out one of these objections (saying that there are lots of jobs that value an employee who can adapt to new intellectual challenges).
However, there is also a broader Net Gain / Loss issue at play in this argument. Whenever an author's conclusion is making a recommendation, they're implicitly saying
So we could also strengthen the argument by hearing of any other benefit we would get by emphasizing liberal arts over technical training (or at least by ruling out a negative).