概率的概率，第二部分--为什么"概率为0"不等同"不可能"

提出问题:

what is probability of probability

P(h=0.70000) = ???

strong possibility for paradox

feels like not matter how small it is

because there are uncountably infinite many of them

it will blow up to infinity

if it is 0, then no useful information

用area而不是高度 height 表示概率. 为什么呢? later

这样面积就是有极限,高度的话就没有极限.

高度角probability density