There are physical limits on how fast or smart you can make braking.<p>We make thousands of unconscious decisions while driving - many of them moral&#x2F;ambiguous.  &quot;Should I pass this car in the intersection even though it is breaking the law?&quot; &quot;Can I squeeze past this bicyclist even though it forces them towards the curb?&quot;<p>The core of most of these arguments assume a fully autonomous world - and it just won&#x27;t work like that.