Comment by bediger4000

The official answer to this puzzle makes a huge assumption: that there is one correct answer. There is not one correct answer. (x, 2x, 4x) gives you a "yes" every time, therefore it is a correct answer, at least as automatically checkable, and there's an infinite number of such tuples. To find a "no" you're reduced to random guessing. That's not a puzzle, that's crap. The confirmation bias material might be true, but the puzzle does not illustrate it.