Rowan knew his biggest weakness was a lack of fundamental knowledge, although he could plan for numerous unknown events using the data he had on hand, this would always lead to a flawed method of deduction.
It was like asking him to guess the size of a house, by just placing him inside one of the rooms. He could do his best to figure out how big the house might be from the size of the room to checking the length and breadth of its windows and the doors, down to the overall dimension of the room.
He could spend hours racking his head and performing countless calculations, but he would be wrong because no matter how he tried to solve this puzzle or any premises he might draw, he could never truly understand what he did not know, and his guesswork could only go so far.