There's no wrath like a Sean Parker scorned.

This week, the entrepreneur extraordinaire took to Twitter to lash out at a journalist who had questioned his business track record.

Parker, founding president of Facebook and the co-founder of Napster and Plaxo (an online adress book), also took the opportunity to do a number on his old pal and colleague Mark Zuckerberg, claiming that the current CEO of Facebook is not "any more a founder" of the social networking site than himself.

In July, writer writer John McDermott had questioned Parker's business prowess, calling his track record "a bit spottier" than some other tech entrepreneurs. McDermott then also implied that the former president of Facebook has less of a claim on the social networking site's founding than he has been given credit for.

"Parker's entrepreneurial activity has leveled off a bit since [Napster and Plaxo]. He became the inaugural president at Facebook -- yet although he is frequently cited as an integral part of the company's early success, it wasn't his endeavor," wrote McDermott in Inc.

On Thursday, Parker belatedly responded to McDermott's comments.

In a series of tweets, Parker clarified his role in Facebook's inception and his views on entrepreneurship.

Here, Parker was referring to Harvard classmates Eduardo Saverin and Dustin Moskovitz, both of whom have also been credited with the site's founding.

In his tweets to McDermott, Parker, who resigned as Facebook's president in 2005 and has been credited by Zuckerberg for helping transform the site into a viable business, described his contributions to the site.

Sean Parker
There were only three legal founders of Facebook: me, Dustin Moskovitz, and Mark Zuckerberg.

Sean Parker
This was substantiated by every company legal document from inception.

Sean Parker
The product designs that I implemented at Facebook for photos, feed, and share were originally designed by me in 2003/2004

Sean Parker
Where did they come from? I designed them for Friendster, Inc. and they never managed to implement them.

However, near the end of his Twitter spiel, the entrepreneur noted that taking "credit" for Facebook was no longer the point.

On Thursday, McDermott responded to Parker's tweets:

The journalist also invited Parker to contact him to have a longer chat.

This is not the first time that Parker and Zuckerberg have had beef. In 2011, the men allegedly got into a drunken fight outside a Hollywood nightclub. The argument reportedly began over Facebook’s role in digital music service Spotify, the New York Post reports.

A Spotify investor and board member, Parker is also the co-founder of Causes, Facebook's advocacy and fundraising application, and Airtime, the live video website. The 35-year-old has a net worth of approximately $2.1 billion, according to Forbes.

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