Every batch there are some groups that fall apart between when we agree to fund them and when YC starts. Sometimes we tell them not to worry about it and do YC anyway, and sometimes we tell them they should take some time to repair the damage and reapply for the next cycle. It depends on how bad the breakage is. If a team of 3 loses 1 person, that's no problem. Whereas if a team of 3 loses 2 people, that's bad.

In this case, the breakage was not only on the bad end of the spectrum, but we weren't told about it till the last moment. IIRC Jon told us an hour before he got on the plane here. That affected our decision more than the breakage itself. At the scale we operate on, we can't afford to have people around who aren't upfront with us.

I'm glad Jon got funded though. As he says, I was quite enthusiastic about what they were working on.