I think Internet forums like this one are useful for students who want to improve on their ability to reason. With that kind of reader in mind, I'll explain the use of a "reasoned argument."
If Henry makes a "reasoned argument," he states a claim and then gives reasons to support its truth. He might also add evidence to support his reasons.
If Henry claims that "Harry and Sally's marriage will never last" but he offers no reasons to support his claim, then he hasn't made a reasoned argument. His statement is simply an unsupported claim.
If Henry claims that "Harry and Sally's marriage will never last." But he then follows with reasons to support it, he has then made a reasoned argument.
If Henry's reasons aren't obviously true, they will need evidence to be persuasive.
It's a waste of time to make arguments with reasons that would only be found persuasive by people who already agree with us. It's also a waste of time to try to change the minds of opponents who are dug into their position. So, bear in mind that: The purpose of making a reasoned argument is to persuade unbiased but doubtful minds of the truth of the claim by removing their doubt.
Smart posters interested in debate, will first make sure they understand the argument in Post One of a forum like this. That often requires asking questions before writing counter-arguments. Sometimes arguments rest on word definitions. In this forum, for example, it's a good idea to find out how the word "faith" is being defined before getting into a debate.
Forum veterans: What advice would you give to students who use this forum as a device to improve on their ability to reason in the context of debate?
Is debate the main purpose of this forum? I came to respectfully share experiences with others who wish to or have encountered the works of the Creator. And, largely that has been true here. In any large group of people, studying any subject, there are always a few individuals who seek to bend others to their agenda. Often they adopt Avatar names that massage their inappropriately sized egos.
I'm unsure if there is a central group whose motive is to "guide" everyone to a theological train of thought that might effectively exclude everyone outside that central group. It is most painful to attempt to find a group that does not bend the Bible, Quran, or what ever the Jews use, to fit their own personal idea what those books should say.
And I know religious leaders who have told me that in Bible College, or where ever, they were not taught to critically examine their beliefs, but to get to know their way around volumes of sermons from other experts. Where I find the most conflict is that I do not give one whit what the experts say. If I can not read the base documents in question and come to the same conclusions as they, that leaves the matter being discussed in serious question.
Admittedly, there are vast differences in interpretation between the Amish, and the Lutherans, or the Catholics and the Baptists, and for me, when those differences become divisive and lead to hateful discussions, both sides are invalid, and I leave the room. Your readings and discussions MUST lead to love of the Creator and one another, else it is all vanity.
If I have unrealistic expectations here, please tell me?