You shouldn't be ignorant of things.
John is at home and hungry on a Friday night alone and is about to cook but doesn't know how or have any recipes.
John wants to make lasagna.
John calls his mom for her lasagna recipe and writes down the instructions.
John guesses what pasta to use and sauce and puts it all together on the fly.
John's lasagna comes out very tasty, and he is happy.
The lasagna comes out awful and John is very upset.