But suppose we could use XOR gates OK, let's take this from the top. The idea is that we start with a black box (no, it doesn't matter whether it's a big box or a small one… look, if you're not going ...

In the 8th May 2006 issue of EE Times , I published a “Brain Boggler” in my Logically Speaking column. The idea is that we have a black box with three inputs called A , B , and C ; and three outputs ...