She can't even chew gum and walk in a straight line, let alone write a book.

She can't even chew gum and walk in a straight line, let alone write a book.

Presidential candidates don't chew gum.

I don't even like gum. But I can chew some gum, and I won't think about eating for a while.

There's no rules. Show me the rule book.

For me, the dumbest rule is that you can't chew gum in school.