How can you know the extent of your ignorance ? If you don't know, then how do you know what you don't know, because you don't know it. If you knew it, then you wouldn't be ignorant, because you would know ??
Neville
" Prose is description, poetry is presence " Les Murray.
“When I was a boy of 14, my father was so ignorant I could hardly stand to have the old man around. But when I got to be 21, I was astonished at how much the old man had learned in seven years.”
― Mark Twain