With respect to reputation of YC, what happens if the pitch although being amazing in an application could be a conflict or add on to one of your existing alrea

With respect to reputation of YC, what happens if the pitch although being amazing in an application could be a conflict or add on to one of your existing already funded groups ?! Wouldn't there be a conflict while you reviewing an application for it to be judged faily ? And also the pitch idea is compromised against the benefit of the founder ! Please advise