I knew this question was coming

Lucy was asking me the difference between edible mushrooms and poisonous ones.
I did my best and then stressed that we only eat mushrooms that come from the grocery store.
"To hunt mushrooms you have to be an expert," I said.
"Well," she said, "I know how much two and two is and I know how to walk to my new school, except I can't remember which way you have to walk first."

...

It's not the cancer that is going to kill me.