Dream Erosion Edge

Forced to log into the same dream world every night. Here, the "nightmare" is a lurking rule loophole that feeds on mental power. Injury means the loss of the soul, and death means complete madness in reality. The only rule of survival is: remain skeptical and stay awake. But this world is constantly learning "reality" and becoming more and more realistic. The layers of dreams within dreams are constantly superimposed, and the boundary between reality and illusion is completely dissolved. In this desperate situation, a "perfect avoider" with superior mental strength but extremely resistant to pain, and a "bluffer" who relies on short sleeps to constantly deal with each other and is good at disguise, go from being wary of each other to being forced to cooperate. They must solve the most fatal bug in this ever-evolving dream logic - otherwise, they will be permanently lost in the cage of their own creation. When a dream perfectly replicates reality, how do you prove that you have woken up?