We will score each idea with the numbers of reasons to agree or disagree with that idea. But, you say, not all reasons will be as good. I'm way ahead of you. We will also score each reason with the number of reasons to agree or disagree with them. That way the good reasons will carry more weight than the bad reasons.
In a way, this website is built on the following quote by Bertrand Russell: "It is undesirable to believe a proposition when there is no ground whatsoever for supposing it is true." This website is a way for us to prove that their are good reasons to support the things that we believe.
If we can map the human genome we should be able to map out all the reasons to agree and disagree with the things that we argue about.
We will have a computer database tell us the number of reasons to agree, and reasons to disagree. My algorithm will be able to use this data to help promote better ideas.