Suppose GMBA class are staying in Paiyun lodge (i.e., 3,402 m) on the way to the summit of a 4,000m peak in Yu-Shan Mountain. During night, the temperature dropped freezing the trail and many of you couldn't sleep due to noise from other climbers in the lodge. The last 600m of the trail to the summit is notorious for its steep, slippery slope and many accidents occur there. The class is divided into two: one group suggests to stop and go down saying that they do not care about the last several hours they already spent in the mountain, but concern about the final 600m. The other group wants to continue because they have already invested significant amount of time and effort. Which group has a more rational argument and why?