I'd argue B is simpler. Why? Naming things is helpful. A function named "atLeastTwo()" is more or less self-explanatory, I don't have to look at the implementat

I'd argue B is simpler. Why? Naming things is helpful. A function named "atLeastTwo()" is more or less self-explanatory, I don't have to look at the implementation to know what it does. In case of A, I have to look at the implementation and figure out what it does. A is maybe more _elegant_, but IMHO it has a higher mental load.