Final answer:
Perceptual illusions cannot be turned off due to inherent brain biases, lack of attention, cognitive dissonance, and limited cognitive resources.
Step-by-step explanation:
Cognitive biases are patterns of quick thinking that can lead to less than optimal results or incorrect decisions. They are similar to perceptual illusions. We can't 'turn off' perceptual illusions because they are inherent brain biases, which means they are a natural part of how our brains process information. Additionally, cognitive biases can be influenced by a lack of attention and limited cognitive resources.