In the most basic form of a prisoner's dilemma game [2x2; Cooperate or Defect, imperfect information], how many total subgames are present?
Preparing for an exam and this solution is not available. My answer would be that there is one subgame. I would argue this as the solution because the game has imperfect information, and therefore has no information sets. Since the game is also one-shot and simultaneous move, therefore only have one main decision node (since the players cannot see one another's choices).
If this is incorrect, please feel free to assist. Thank you.