I agree that using a boolean or calling a function that returns a boolean is the best case for readable code. I think that familiarity with a language leads to

I agree that using a boolean or calling a function that returns a boolean is the best case for readable code. I think that familiarity with a language leads to using the falsy logic rules without explicit boolean logic. When script programming falsy logic can be broad and useful but for software that needs to be robust explicit boolean logic can not be beat.