If Rodney had been in his right mind, he surely would have realized that Wen Wen was actually inquiring about the location of their base. But in his current state, he could not think so clearly. He only felt that Wen Wen was asking some irrelevant questions.
Next, Wen Wen used similar tactics to draw information out of the now mentally challenged Rodney, who spilled everything to Wen Wen without any reservations.
From how many people they had to the strength of their most powerful experts, and what type of abilities they possessed, Wen Wen now had a rough idea about all of these.
The only issue was that Wen Wen felt an inexplicable sense of shame in tricking someone who was mentally challenged, as if he was taking candy from a child by exploiting his superior intellect.
However, with shameless acts comes habituation. Eventually, Wen Wen even managed to extract information about the Faceless Demon's special hobbies.