He theorizes that it is the emotional component of these intangible prizes that make them effective.
出自-2016年12月閱讀原文
Now what’s interesting about the theory is what do you have if you only have one out of three or two out of three? What do you have and how is it different if you have a different two out of three? What’s interesting about this kind of theorizing is it gives rise to many different combinations that can be quite interesting when you break them down and start to look at them carefully.