About rbutr

rbutr is a community driven system which maps links between webpages where the content of one page is a critical response to the other. The content may be directly arguing against the original content, or generally presenting contradictory evidence.

Users of our browser plugins are alerted when they visit a rebutted page, and they can easily access any of the critical responses we have in our system. Anyone unable to install the plugin (mobile device users for example) are able to check for responses to webpages by adding rbutr.com/ to the beginning of that page’s URL.

One of the basic premises which lies behind the rbutr project is the belief that if you are accessing information, then you have the right to know if someone has critiqued that information. If someone else has taken the time to respond, criticise or argue against the content you are accessing, then that response is potentially incredibly important to what you have just read, watched or heard. You have the right to know about it. – the right to know

Our objectives with this technology is to help ensure people are never trapped with just one information source on a subject that they care about. Br providing access to critical responses to that source we can ensure misinformation is corrected, scams are exposed, bias is called out, context is provided and everyone has access to the full story.

Our long term hope is to promote critical thinking in future generations by demonstrating to them that every claim can be critically analysed, and by making that process a regular daily occurrence in their lives.

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F.A.Q | Getting to know rbutr

More Details

  • Operations began in February 2012
    • Public Beta launched on the 6th of March 2012
  • Some seed funding and support has been provided by the Start-Up Chile program
  • Focus over 2012 and 2013 has been on developing a solid foundation of “true fans” who will cheer rbutr on to wider audiences
  • At the beginning of 2014 we are now focusing on expanding into the Education sector as well as releasing some new major developments


Shane Greenup rbutrShane Greenup graduated from the University of NSW, Sydney Australia in 2005 with majors in Philosophy, Molecular biology (hons) and the History and Philosophy of Science. After graduation he went on to develop an Internet and Affiliate Marketing business which he has operated profitably for over seven years.

rbutr was originally Shane's idea, and it is the ideal culmination of his backgrounds in philosophy, science, Internet marketing, and Internet based entrepreneurship.
Craig O'Shannessy rbutrCraig O'Shannessy has over 22 years of experience operating his own software engineering freelance business, which has given him an expertise in software analysis, design, project management and application development.

Another successful solo entrepreneur, Craig's project management and technical expertise is the perfect complement to Shane's Internet marketing experience and visionary drive.


Harry Durgin rbutrHarry Durgin is a successfully retired serial entrepreneur and hacker who joined our team mid 2013 as a full time volunteer developer. His specialties include hardware systems integration, UNIX, database management and interface design.

Advisors and Advocates

Aubrey de'Grey rbutrDr. Aubrey de Grey is the Chief Science Officer of SENS Research Foundation, the Editor-in-Chief of Rejuvenation Research, and Author. He received his BA and Ph.D. from the University of Cambridge in 1985 and 2000 respectively. His original field was computer science, and he did research in the private sector for six years in the area of software verification before switching to biogerontology in the mid-1990s. (More on Wikipedia)
Michael Shermer rbutrMichael Shermer is the founder of the Skeptic Society, editor of Skeptic Magazine, columnist at Scientific American, and science writer with over 15 published books behind him. Michael Shermer joined rbutr as an advisor and supporter early August 2012. (More in Wikipedia)
Tim Farley rbutrTim Farley is a computer software engineer, writer and instructor with an expertise in computer security and reverse engineering. He is a Research Fellow of the James Randi Educational Foundation, the creator of the website What's The Harm?, and the owner of the SkepTools blog. (more on Wikipedia)

Tim was one of rbutrs first serious supporters and has written and talked about the value of rbutr as a tool for critical thinking online numerous times since rbutr was started.

Contact Details

You can reach Shane at email to contact rbutr where he can provide further contact details for himself or Craig.

Also possible to reach us at twitter: @rbutrcom or @aegist

And also through our facebook page: rbutr

“rbutr’s ultimate goal is to provide an easy way out of the confirmation bias bubble we all subconsciously construct around ourselves, where we are only ever presented claims and beliefs with which we already agree.”

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