The post is apparently a marketing effort. The interview question is pretty old. If it is that effective as claimed, it would have been known and applied widely

The post is apparently a marketing effort. The interview question is pretty old. If it is that effective as claimed, it would have been known and applied widely. (Then, candidates will prepare for the question and it is not revealing at all.) Also, claiming any interview question as <bold> MOST </bold> revealing is simply simple-minded.