The argumentation is a bit on weak side. There are really no rules, it's just all about confidence, which only comes with practice. You can't learn that by read

The argumentation is a bit on weak side. There are really no rules, it's just all about confidence, which only comes with practice. You can't learn that by reading articles like this. During an interview, put your candidate outside his comfort zone, if you can, and it will tell you much more than any formal bullshit.