[Nobody]

There's a Zen expression "mu shin" (no mind), similar to the samadhic means leading to the Hindu Nirvanic state. It fits fairly well with the Taoist undefinable nothing, as the orgination of consciousness which goes hand in hand with the physical Universe according to Eastern mind-body unification.

Consciousness can be directly associated with the atomic scale, which naturally arises from and is governed by the subatomic and further the subquantum scale which is linked with the subconscious and beyond to the original universal state of mind and matter - the stillness of the void which is the only possible state with the capacity to differentiate all other states.

Then through imperfect replication, similar to DNA replication, information from all possible universal states would be recorded or encoded and the Universe itself could then be considered "all-knowing."