Socratic Method is one of the oldest and most respected forms of productive debate. There are many unproductive methods. All of which should be avoided. Socratic method is a very old and respected means to quickly and definitively resolve difficult issues by adhering to rules of conversation which are carefully designed to keep the discussion on track and drive it toward rapid and unreserved conclusion. Conclusion is reached when after carefully selecting questions designed to spotlight an affirmation's error, no one involved in the conversation is any longer willing to dispute the rationality of the affirmation.
Wikipedia on Socratic Method
In this way, conclusion is forced upon those who remain in disagreement, but have no rational reason for their disagreement. One remaining in disagreement is forced to admit "I still disagree, but fail to provide a reason for my disagreement which others perceive as rational." The irrationality of his or her position becomes obvious to those involved in the conversation.
For this reason Socratic Method is very unpopular with politicians who often desire to remain uncommitted on some issues.
How do I comment in Socratic Method if I disagree?
Do not pose an alternate position or attempt to show that there is a better way to handle the issue. This is the error most make in debate. Nothing ever ends up resolved because both sides continue supporting their respective and opposing views and neither view is refuted. Neither party has any reason to concede. Neither party finds it intellectually embarrassing to continue supporting their original position.
First, make sure you disagree. An argument is not won with fancy words, but by discovering the winning side before choosing your position. Is your position winnable? If not, accept it and change your mind, otherwise Socratic Method will reveal your irrationality to others. Once you've answered that, list the assumptions upon which the affirmed statement rests, and which if shown to be false, make the affirmed statement's error obvious to others.
Restate that assumption in language and terminology which make the affirmation's reliance upon the assumption obvious and ask those affirming if they agree with the assumption.
If the assumption is specious, wait to point out the assumption's flaw in your second question after those affirming answer their agreement with the assumption. Post "Considering that you agree with that particular assumption, do you also agree with its obviously erroneous implication, thus.....?
If you have difficulty finding an erroneous assumption or an error of conclusion implied by assumptions made in the affirmation, double check that you still disagree. You may find, to your surprise that you agreed with the statement all along. You just didn't think about it carefully enough at first.