I think PG is talking about YC's selection process. A startup applied, was not accepted, but became a success. Selection is the core of YC team's job, and this

I think PG is talking about YC's selection process. A startup applied, was not accepted, but became a success. Selection is the core of YC team's job, and this post is a self reflection on how can they get better. In that sense, this is certainly a bug.