> 3.Short-term read-write memory is fast but tiny, typically storing 2 or 3 chunks, each chunk being a pointer to some item such as a digit or number, a character or word, an image or music clip. In our model, unlike anything we find in the psychological literature, a chunk is a well-defined object, a pointer into memory.
they missed the 4 additional 5 bit registers - fingers and toes.
Add another bit for males, although state changes are slow enough that it might not be too useful on most computations. Tongues and eyelids can also provide some storage.
https://arxiv.org/abs/1707.01204
(this could be automatic for arxiv)