The implication of saying that there are things
children must learn to study is that the children may not
want to learn them, because they won't know that they are
valuable until later. But if you can't enumerate them all,
then how do you know, when you are forcing your children
to do one of them, that you are not preventing your children
from doing another? Also, if you can't enumerate them all,
how do you think the children are going to learn the ones
you are unable to enumerate? In fact, I believe that not
only can you not enumerate them all, but you can't KNOW
them all, that you can't even know a millionth part of
them.