In the book "The Dark-Haired Girl," Philip K. Dick speculates on the possibility of telepathy and its implications for communication with extraterrestrial intelligence (ETIs). He acknowledges the potential existence of telepathy, suggesting that if both telepathy and ETIs are real, the CETI project's goal of using telepathy for communication could be a valid concept.

However, Dick also raises a cautionary note, implying that if neither telepathy nor ETIs exist, any attempts to communicate in this manner would be futile. This reflection highlights the complexities and uncertainties in the pursuit of connecting with other intelligent beings through unconventional methods.