He fell into the same trap he set in the first round. Last chapter via clairvoyance the telepath "knew" it's either Rock or Paper but more then 5sec later it turned out it was a trap as it was a clone and it really was Scissor.
Now via Deduction he knew it was either Rock or Scissor, but later it turned out it was a trap as the telepath lied about changing sets.
The very same trick.