第一句话,“Albert : I don’t know but I know that Bernard doesn’t know too" 只能排除5月19日和6月18日两个日子。其他的日期仍然处在可能的状态之中。为什么官方的解答非要先入为主地排除5月和6月(大多数网上这种解释都有预设A已经拿到了7月或8月的牌之嫌)?
别争了,google了一下。官方答案是7月16。Singapore and Asian School Math Olympiads 在脸书上放了几张截图,给出了详尽解释,以及为什么会有8月17这个争议。这里不让发链接,请在下面内容之前自行加入脸书的域名(注意是https)
/4sasmo/posts/983812798320363
I just googled this problem. It turned out to be a more serious problem.
The BBC official website actually had a guy on a video to explain how to get the wrong answer (using the same incorrect logic)! I hope BBC will find out and make a correction for its audience.
红烧茄子- 发表评论于 2015-04-15 11:46:45
这道题,如果把二人的对话改为下列四句才更有意思,答案就是8/17。
Bernard: I don’t know.
Albert: I don't know either.
Bernard: Now I know.
Albert: Now I know too.
OMG! I am totally giving up!!
You cannot reason with someone unreasonable.
Will someone please find the key for the original test, so our poor kids will not be confused by their parents?!