You are invited to a welcome party with 25 fellow team members. Each of the fellow members shakes hands with you to welcome you. Since a number ofpeople in the room haven't met each other, there's a lot ofrandom handshaking among others as well. Ifyou don't know the total number of handshakes, can you say with certainty that there are at least two people present who shook hands with exactly the same number of people?