Since they basically intentionally screw with your mind and there’s no rhyme or reason behind them no matter how hard you try?
Koan: a nonsensical or paradoxical question to a student for which an answer is demanded, the stress of meditation on the question often being illuminating.
The most famous koan: What is the sound of one hand clapping?
Here are another couple of exampes:
A monk asked Zhaozhou, “What is the meaning of the ancestral teacher’s (i.e., Bodhidharma’s) coming from the west?” Zhaozhou said, “The cypress tree in front of the hall”.
HuÃ¬nÃ©ng asked Hui Ming, “Without thinking of good or evil, show me your original face before your mother and father were born”.
So … Are Koans the David Lynch movies of thoughts?
For reference: David Lynch did “Twin Peaks”.