var obj = {};

//true
console.log(obj.constructor.prototype === Object.prototype);

//true
console.log(obj.__proto__ === Object.prototype);

//false:
console.log(obj.constructor.prototype === obj.__proto__ === Object.prototype);

Why is the last condition false? I'm suspecting because the order of precedence is executed from left to right, causes:

obj.constructor.prototype === obj.__proto__ === Object.prototype

to become:

true === Object.prototype //this is false

Altough i'm not 100% sure. Any reaffirmation is appreciated.