premise: A mountaineer about to descend down a mountain with a blue helmet on. hypothesis: A person starts to climb down the mountain before it gets too dark.
neutral: Just because a mountaineer is going to descend down the mountain does not mean that it is because it is getting to dark.|neutral: We have no idea it is about to get too dark, it might be early in the morning.|neutral: A man can climb down a mountain well before it gets too dark at other times of the day.