> they're not strictly necessary. We know this because humans can drive without a LIDAR and propellers on a plane are not strictly necessary because birds can

> they're not strictly necessary. We know this because humans can drive without a LIDAR and propellers on a plane are not strictly necessary because birds can fly without them? The history of machines show that while nature can sometimes inspire the _what_ of the machine, it is a very bad source of inspiration for the _how_.