I had a housemate last year who couldn't cook the simplest of meals.
He once put a pizza in the oven, noting that it took 12-14 mins on Gas Mark x. 20 minutes later he comes to my room and says, "It's melted." The problem isn't only that he let it cook 50% longer than the packaging recommended, but that HE LEFT THE PLASTIC WRAPPING ON IT.
We tried about half a dozen times to teach him how to cook pasta, and he still couldn't be the end of the year.
He put plastic-handled knives in the oven, left cream cheese in the fridge to the point of the mould turning pink, and eventually ordered Domino's pizza so much that they sent him a loyalty card in the post.
But then it wasn't just his cooking. He once got his foot run over by a car. He was equidistant from a hospital and the library I was working in. He walked to the library with a heavily-painful foot which he couldn't bend to toes of, to ask me what he should do.
He was a medicine student.
I only live with one other person now, both of us can cook, and life is good.
When I've had full-time work over the summer, all of us sharing (16 in halls over 2 floors) have been able to cook and it's saved us a fortune - plus it's great fun to try new things, all get together for a couple of beers and some dinner.