Ev Williams on the left, Biz Stone on the right. Christopher “Biz” Stone is a minor celebrity thanks largely to a bold decision he made in the very early days of Twitter’s founding.

When Twitter was starting to take shape, Stone emailed Ev Williams, who was bankrolling Twitter, and asked, “Maybe this is inappropriate, but if I don’t ask, I’ll never know! What do you envision my title to be? Is there a chance I could be called co-founder?”

Williams wrote back, “I don’t know the answer to this yet. It is not an unreasonable request.”

These emails were reported by Nick Bilton in “Hatching Twitter,” a book on the founding of Twitter.

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