- Mon Oct 19, 2020 1:59 pm
Your best bet on a Global-CANNOT question, if nothing jumps out after a quick read of all four answer choices, is to continue with the game and come back to the question after you've diagrammed as many legitimate solutions as you need to for local questions in the game. Use those local-question solutions to eliminate answer choices. For example, answer choice D to question number 12 shows that S can run in the race immediately before T, which eliminates answer choice C on this question. Similarly, you can use your work for questions 16 and 17 to eliminate other answers on this question. If my memory serves on this game, there are enough diagrammed solutions on the other questions to eliminate every wrong answer on this question.
After the fact, though, when you're in review mode, try to determine whether you could've predicted the answer using the restrictions on variables that you know exist in the game. Here, an interestingly restricted answer is answer choice A. For anything to be immediately before Smith, it has to be in position 2 (since Smith can only go in 1 or 3). So for A to work, you must put R in position 2, which immediately triggers another rule in the game (it forces U out). Now all that's left are Q and T, which can't be split when they are in.
No other answer is so specific about the exact placement of the variables involved! For S to be immediately before something else, it could still be in 1 or in 3 (so answers B and C aren't as immediately restrictive on the placement of the variables involved). We similarly can't tell what's going on with the placement of variables in answers D and E (since T isn't that restricted until we know Q is in), so there are likely to be more options for those variables. You can use some of these intuitions about the variables and their placements to try to determine the best answer to begin testing. You might not be perfect about this at first, but the more you try, the better you'll get at it.
I hope this helps!