@
bojackhorseman 搜了一下这本书里的 reasonable ,粗略看了一下,大部分应该被翻译为“合理”,不过这一处应该被翻译为“可推导”,原文如下:
The dialogue between the teacher and the students may start as follows:
“What is the unknown?”
“The length of the diagonal of a parallelepiped.”
“What are the data?”
“The length, the width, and the height of the parallelepiped.”
“Introduce suitable notation. Which letter should denote the unknown?”
“x.”
“Which letters would you choose for the length, the width, and the height?”
“a, b, c.”
“What is the condition, linking a, b, c, and x?”
“x is the diagonal of the parallelepiped of which a, b, and c are the length, the width, and the height.”
“Is it a reasonable problem? I mean, is the condition sufficient to determine the unknown?”
“Yes, it is. If we know a, b, c, we know the parallelepiped. If the parallelepiped is determined, the
diagonal is determined.”