Separately from Hameroff, the English mathematical physicist Roger Penrose had published his first book on consciousness, "The Emperor's New Mind", in 1989. On the basis of Gödel's incompleteness theorems, he argued that the brain could perform functions that no computer or system of algorithms could. From this it could follow that consciousness itself might be fundamentally non-algorithmic, and incapable of being modeled as a classical Turing machine type of computer. This ran counter to the belief that it is explainable mechanistically, which remains the prevailing view among neuroscientists and artificial intelligence researchers.