It was a pen name, and as Wikipedia mentions, was used by several different writers. It was made clear in his (their?) columns, at least in the early days, tha

It was a pen name, and as Wikipedia mentions, was used by several different writers. It was made clear in his (their?) columns, at least in the early days, that the name was fictitious. What happened here is a little different. Someone was claiming to be two different real people. In at least one case he even interviewed himself.