Q: Which is simpler, diagram A or 

diagram B?

Q: Which code is simpler?  Code C: 

function Cons(x,y) { 

    this.car = x; 

    this.cdr = y; 

};

function car(cell) {

    return cell.car;

};

function cdr(cell) {

    return cell.cdr;

};

or Code D? 

function Cons(x,y) {

    return function(placeholderFunction) {

placeholderFunction(x,y);

    };

};

function car(cell) {

    return cell(

function(x,y){

    return x;

}

    );

};

function cdr(cell) {

    return cell(

function(x,y){

    return y;

}

    );

};

Simplicity can be defined as “lack of nuance”.

It is the Software Architect’s responsibility to make the design readable and understandable.