Adding is favoured over subtracting in problem solving – Nature.com

Consider the Lego structure depicted in Figure 1, in which a figurine is placed under a roof supported by a single pillar at one corner. How would you change this structure so that you could put a masonry brick on top of it without crushing the figurine, bearing in mind that each block added costs 10 cents? If you are like most participants in a study reported by Adams et al.1in Nature, you would add pillars to better support the roof. But a simpler (and cheaper) solution would be to remove the…

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