From Longman Dictionary of Contemporary Englishany fool can do somethingany fool can do somethingspokenEASYEVERYONE used to say that it is very easy to do something or to see that something is true Any fool could have seen what would happen. → fool
Examples from the Corpus
any fool can do something• Any fool can make a baby, but it takes a real man to raise his children.• But it is for you already, any fool can see you're in no shape to continue.• Conversely, any fool can sit down at a slot machine.• Of course any fool can write down 1,2, 3,4 and even 5,6, 7,8 opposite the names of candidates on a ballot paper. 