During an earlier this week interview with ABC’s Diane Sawyer, Facebook CEO Mark Zuckerberg denied having signed any deal with Paul Ceglia, granting him a 84 percent of the social networking site for $1,000.

The statement from Zuckerberg came with reference to the last-month lawsuit filed by Ceglia, who claims that he and Zuckerberg had signed a contract, under which he was entitled to a 50 percent hold of the company for the $1,000 financial help he extended to Zuckerberg.

Ceglia further claims that, as per a clause in the contract, 1 percent ownership was to be added for each day after January 1, 2004, till the time TheFacebook.com site became functional.

Noting that a Facebook’s lawyer earlier comment that that the company was “unsure” whether such a contract had been signed was probably taken out of context, the 26-year-old Zuckerberg clarified: “I think we were quite sure that we did not sign a contract that says they have any right to ownership over Facebook.”

During the course of the interview with Sawyer, Zuckerberg also pointed to the fact that Facebook had passed the ‘500 million users’ milestone; as well as talked about the Facebook’s contentious privacy issues, various legal clashes, and the site’s plans for a “dislike” button.

While Zuckerberg said that Facebook would “definitely think about” the much-requested “dislike” button, he refrained from committing that such an option will be added to the site.