CV and mad panic behaviour

[Mav]

I wonder if an average student was offered tuition that would guarantee 90% in an exam, would s/he say, “No thanks, that isn’t 100% so it’s no good”.

In a binary world, I guess that would be the way. If you don’t get 100%, you must have got 0%. There’s nothing in between.

I can see now why you think Ivermectin can compete with vaccines. Ivermectin's 0% success rate is the same as the 90% effectiveness of the vaccines as neither is 100%. It makes sense, I guess.