17. Based upon my involvement in the computer industry for over 13 years, my knowledge of the vBulletin software since 2006, my extensive background in computer programming for 15-20 years, and my review of the source code used in theXenForo software, in my opinion, it would have been impossible for a software company ofXenforo's size to develop XenForo from scratch between June 30,2009, and July 28, 2010, as stated by Darby in paragraphs 6 and 9 his declaration in support of his motion. It took Jelsoft and VBSI more than ten (10) years to develop vBulletin to this point with Darby working on the project. The fact that Darby was able to program and release a bulletin board software program that included certain more advanced features than vBulletin in a mere thirteen months is a clear indication to me that Xenforo and its programmers simply copied vBulletin's code, and spent the last year adding to this product the new features that were planned for subsequent versions ofvBulletin. I declare under penalty of perjury of the United States of America that the foregoing is true and correct. Executed this 23rd day of December, 2010 at El Segundo, California.