Hardball Big Number: 7http://hardblogger.msnbc.msn.com/archive/2008/01/17/585789.aspxOn Wednesday's "Hardball," Chris Matthews explained why seven was the Hardball Big Number of the day."John Edwards, who lost in Iowa and lost in New Hampshire, showed good signs of life in last night's Democratic debate. And how did he do that?en-USCommunityServer 2.0 (Build: 60608.1)