| typeof (xb): object | |
| xb === yb: true | |
| xb !== zb: true | |
| xb == true: true | |
| xb === true: false | |
| xb.foob: 3 | |
| typeof (xn): object | |
| xn === yn: true | |
| xn !== zn: true | |
| xn == 5: true | |
| xn === 5: false | |
| xn.foon: 3 | |
| typeof (xs): object | |
| xs === ys: true | |
| xs !== zs: true | |
| xs == 'bob': true | |
| xs === 'bob': false | |
| xs.foos: 3 |