Professor: It has been argued that all judges should be elected rather than appointed to their positions.
Conclusion
It would be a bad idea if all judges were elected rather than appointed.
Evidence
If judges were elected, they'd have to raise funds, which means they'd accept campaign contributions from special interests, which means they'd be likely to run into the same conflicts of interest that politicians run into when they accept contributions.
Evaluate
We want a principle that gets us from something we were told in the Evidence about "electing judges", such as - they'd have to fundraise - they'd take contributions from special interests - they'd presumably run into conflicts of interest and uses that to get us to Conclusion language like "bad idea / should have judges be elected".
Goal
If they'd have to fundraise, then electing judges is a bad idea
or
If it would mean that they're taking contributions from special interests, then electing judges shouldn't be done
or (most likely, since this idea was deepest in the chain of Premises)
If it would produce conflicts of interests for judges, then we shouldn't have them be elected.