On 11/03/2008, Kurt Maxwell Weber kmw@armory.com wrote:
"The responsibility for justifying inclusion of any content rests firmly with the editor seeking to include it.--Hu12 (talk) 01:06, 11 March 2008 (UTC)"
I agree. All that's required to remove unsourced information is someone disputing it (generally, we tag it and give someone a chance to source it, but I don't believe there is a requirement to do so). To put it back again, you need to find an adequate source. The burden is most definitely on the person wanting to include the disputed content.