If consciousness is due to "correlates of consciousness", then a slightly modified correlate will maintain consciousness. If M neurons can be conscious then M-1 can be too. If M-1 can be conscious then M-2 can be too. Thus, any number of neurons can be conscious. Furthermore, if a neuron can be conscious, then a slightly modified neuron can be also. Following a similar argument, a neuron can be transformed into any other object while incrementally maintaining consciousness. Therefore, a rock can be conscious. So, any biochemical process can exhibit consciousness.