Lateral Thinking (2)
『Lateral Thinking (1) 』の続きになります。
What type of thinking would you use to solve the problem? You may believe that careful logical analysis must solve the problem if there is a solution. This type of thinking is straightforward vertical thinking. The other type of thinking is lateral thinking.
Vertical thinkers are not usually of much help to a girl in this situation. The way they analyse it, there are three possibilities:
1. The girl should refuse to take pebble.
2. The girl should show that there are two black pebbles in the bag and expose the money-lender as a cheat.
3. The girl should take a black pebble and sacrifice herself in order to save her father from prison.
None of the suggestions is very helpful, for if the girl does not take a pebble her father goes to prison, and if she does take a pebble, then she has to marry the money-lender.
straightforward vertical thinkingの箇所なのですが、
vertical でそもそも”垂直の”という意味だと思うのですが、それにstraightforward（まっすぐな）という形容詞をつけている理由がよくわかりません。
ここのstraightforwardは何か別の意味なのでしょうか？
よろしくお願いいたします。
