rbutr
rbutr tells you when the webpage you are viewing has been disputed,
rebutted or contradicted elsewhere on the internet.
rbutr is a community-driven app which connects webpages together on the basis that one page argues against the other.
Visit a rebutted page and you will be told "There are rebuttals to this page." You can then open up the rebutting article(s).
Found a great rebuttal? Connect it to the page(s) it rebuts so that people reading those articles can know about it.