One of the cited papers is a really nice read to solve an even harder version of the problem using only two questions. The reasoning behind the solution is expl

One of the cited papers is a really nice read to solve an even harder version of the problem using only two questions. The reasoning behind the solution is explained in a pretty clear and detailed, but not overly verbose, way. For those who have basic knowledge about logic it is a nice application of the fact that a boolean expression has three possible values - true, false, and . Unfortunately the file is behind a paywall (science's version of the age of information), so I'm afraid it's restricted to those with university access. http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8284.2007.00723.x/abstract;jsessionid=44EA4FAA98F9548D894CE55BC56B4D29.f01t01 http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8284.2007....