Airplane's wing mimics a bird's wing. A hot air balloon does not. They both achieve the same thing if that thing is levitation and overcoming gravity to become airborne. There might well be more than ione process which gives rise to a similar result. Yet the passage of electrons through a speaker produces a near-exact replication of the same signal. Clearly, a vibrating string is not the only way the sound we associate with it can come into being. There might well be other forms of 'brains' or neural networks (in existence or in possibility) capable of achieving the same end result.