Implementing NOT, AND, NAND, OR, NOR, XOR and XNOR operators in JS with Underscore.js and Babel

XOR.js

'use strict';
let NOT = (arg) => !arg;

let AND = (...args) => _.reduce(args, (acc, next) => next? acc: next, true);
let NAND = _.compose(NOT, AND);

let OR = (...args) => _.reduce(args, (acc, next) => NOT(next)? acc: next, false);
let NOR = _.compose(NOT, OR);

let XOR = (...args) => 
  _.reduce(args, (acc, next) => OR(AND(NOT(acc), next), AND(acc, NOT(next))),false);
let XNOR = _.compose(NOT, XOR);

console.log(AND(true, false)); // => false
console.log(OR(true, false)); // => true
console.log(XOR(false, false, false, true)); // => true

console.log(NAND(true, false)); // => true
console.log(NOR(true, false)); // => false
console.log(XNOR(false, false, false, true)); // => false