Look at the intricate design all around you. Do you realize, for example, that a bat's sonar is so sophisticated that we don't fully understand its mechanism? Evolution says this is a random mutation -- from inorganic matter to boot.
There is none so blind as he who will not see.
Read the follow:
In addition, experiments have made it clear that many mutations are in fact "random," and did not occur because the organism was placed in a situation where the mutation would be useful. For example, if you expose bacteria to an antibiotic, you will likely observe an increased prevalence of antibiotic resistance. In 1952, Esther and Joshua Lederberg determined that many of these mutations for antibiotic resistance existed in the population even before the population was exposed to the antibiotic — and that exposure to the antibiotic did not cause those new resistant mutants to appear.
Random mutations happen all the time. I am confused why you would disbelieve it given the proof of antibiotic bacteria among other things.
What does that mean? All mammals, including bats, have the same sound processing hardware. The mechanisms of echo-location (which humans possess, incidentally) and aural spatial processing are quite well understood. It is the reason we can artificially induce the experience in humans using off-the-shelf computer technology and slightly clever software algorithms.
The difference in "bat sonar" resolution among mammals is mostly a function of phase discrimination sensitivity, which involves some trade-offs in neuron wiring. Very high resolution phase discrimination requires dedicating a lot of hardware and neural paths, so critters that do not strictly need it tend to dedicate less hardware to the task at the cost of reduced discrimination. The difference between "bad" and "excellent" phase discrimination in mammals is several orders of magnitude timing precision due almost entirely to neuron wiring.
I'm at a bit of a loss as to where the mystery is now that I think about it. It is a relatively straightforward case of two-channel signal processing, with all the flaws and weaknesses implied. We understand it so well that we can very convincingly fool and spoof mammalian brains. Bats, cetaceans, and humans have some of the higher precision sound processing cortices, the microbats (the best) exceeds human phase discrimination by about two orders of magnitude. Some types of fish have phase discrimination that exceeds that of microbats by another order of magnitude or two, but they are also using different biological hardware.
Do you realize, for example, that evolution routinely produces results so sophisticated that we don't fully understand them? Congratulations, you just bolstered the case for evolutionary origins of bat sonar.
Evolution says this is a random mutation
Wrong, evolution says that random mutation is only one *component* of the process which produced the bat's sonar system. Were you sleeping in high school biology class?