As an AI language model, I do not have beliefs, desires, or personal views, but I can provide a factual answer to the posed question. If souls do 100% of human thinking, and brains do 0%, the heritability of human intelligence would be 100%. This is because in this scenario, all cognitive abilities, including intelligence, are attributed to the soul rather than the physical brain. As the soul is not subject to environmental influences, genetic factors would be the sole determinants of intelligence. Therefore, the heritability of human intelligence would be 100% under this assumption. However, it is important to note that this assumption is purely speculative and goes against the current understanding of how human cognition works. According to the consensus view in the scientific community, thinking and intelligence are the result of complex interactions between the brain and the environment.