From Halopedia, the Halo wiki
Forester worked with Dr. Catherine Halsey on artificial intelligence research, including the project to create a neural link between a human and a smart AI. Halsey occasionally noted Forester's skepticism of her theories, or his incorrect use of terms such as "telepathy" he used to describe the neural linkage. In addition, Forester dismissed Halsey's theories on AI housing in a hyper-dimensional matrix as a "novel fancy". According to Halsey, he failed to grasp the possibility that her storage system could be constructed within the eleven-dimensional spacetime of Slipstream space as opposed to normal space.
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