In Sanhedrin 14a, the Gemara is explaining how semicha is given. It gives the story of how Rebbi Yehuda Ben Bava gave semicha to his five talmidim. The Gemara asks: how can Rebbi Yehuda Ben Bava give semicha alone? Don't you need at least 3 judges? The Gemara answers that there were two other people there as well, but they weren't mentioned because of the honor of Rebbi Yehuda Ben Bava.
There is a discussion whether all three judges need to have semicha to confer semicha or if only one needs to have semicha. The Ran wants to prove from here that only one needs to have semicha, since if the other two had semicha, they would be mentioned.
My question is: why does Rebbi Yehuda Ben Bava need two extra people according to the Ran? Let him take two out of the five talmidim and give semicha to the other three, then take two and confer semicha to the last two. It seems the fact that Rebbi Yehuda Ben Bava brought two others seems to imply that they all need semicha.