Encourage your candidate to write a list of all the things that are necessary to know in order to form a sound judgment on a certain issue. Ask him to draw conclusions on the basis of this list and to see what a colleague thinks of them.
Ask your candidate to contemplate on the solutions and decisions that did not have the effect he had hoped for. Ask the candidate to analyze why this was the case and reflect on these experiences.
Encourage your candidate to ask other people’s opinions when facing a problem.
Consider a certain issue or problem with your candidate by brainstorming. Do not put his suggestions up for discussion (yet). Review the pros and cons of each suggestion together.
Encourage the candidate to ask someone who is known for his sound judgment how this person comes to make a judgment.