How did you ascertain that they didn't know?

How do you differentiate not caring what number you gave them from not knowing? The fact that they showed no reaction is more of a sign of how few fucks are given rather than everyone else's ignorance.

How do you differentiate not caring what number you gave them from not knowing

I said how in the comment to which you replied.

Where did I say, "fact that they showed no reaction"? Why do you interpret something unstated as a fact?

Because you failed to bother to give a more comprehensive answer when I asked how you knew I extrapolated. Did you personally conduct a survey?