This does not state if the coin flip is for each question, or each "session", that is the entire series of questions. If interpreted as being a single random selection which lasts for the duration of the session, Rabern and Rabern show that the puzzle could be solved in only two questions; this is because the counterfactual had been designed such that regardless of whether the answerer (in this case Random) was as a truth-teller or a false-teller, the truthful answer to Q would be clear.