"The Boxes" doesn't work because it's not a premise of the problem that no two boxes contain the same.
Camels wouldn't be able to think it out, anyway
Some questions are kinda wonky (the box one, for instance). The rest were either super easy or super easy-but-I'm-a-fucking-idiot-that-can't-get-it-anyway. :P
Well whatever. I don't know if learning logic is logically accomplished expressly through the solving of logic problems, really. I think exposing your brain to these sorts of problems is only part of the equation, really. I think the real key is mastering a general, consistent, low-level problem dissection ability to discipline your brain to stick to the important information, build off that discipline to deduce and infer logical conclusions, and then learn to build off that in turn iteratively until only conclusion is left.
Logical problems are really just layered stacks of simple problems that tightly depend on each others answers. I really want to learn to get myself to think like that effectively.
From the page: "The Boxes
There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.
How can you label the boxes correctly?"
wanna know the answer? check out this page. fun!