1) Based on....what? Oh nothing. Got it.
2) Oh no they are not because humans can still swim and walk over HILLS.
3) This is such a retarded argument you retards have. Yeah no shit walls work in many scenarios. That doesn’t somehow mean a linear wall along 2000 miles of border is an effective solution to illegal immigration. Not even close.
Maybe you could show us how easy it is to climb a 30' wall and drop down safely to the other side....in the dark, with all your worldly possessions, knowing that the coyote guiding you will abandon your ass if you don't hurry the fuck up.