> It can't be difficult to make conclusions about the current position of stationary objects. You need to know that there is a stationary object in the first p

> It can't be difficult to make conclusions about the current position of stationary objects. You need to know that there is a stationary object in the first place, of a kind you care about (not a plastic bag). I.e. that it's not actually a moving object, an optical illusion, etc. You also need to know that you are going to end up moving through it (it's not a parked car that you will avoid by following your lane). That's... not trivial. (going to be was probably poor phrasing on my part, sorry)