According to U.G., his life-story can be separated into the pre- and post-calamity parts. Describing his post-calamity life, he claimed to be functioning permanently in what he called "the natural state": A state of spontaneous, purely physical, sensory existence, characterised by discontinuity – though not absence – of thought. U.G. also maintained that upon finding himself in the "natural state", he had lost all acquired knowledge and memories, and had to re-learn everything, as if "...the slate had been wiped clean".