A hypothetical supernatural quality of a Mind or a Sentient being. In other interpretations, it's synonymous with Mind
CHURCH-TURING THESIS, SOULISTS' VERS ION: Some kinds of things which a brain can do can be vaguely approxima ted on a computer but not most, and certainly not the interesting ones. But anyw ay, even if they all could, that would still leave the soul to explain, and there is no way that computers have any bearing on that.