logical

The detective used a logical approach to solve the crime, step by step.

(Chinese) 侦探采用逻辑方法，一步步破解了罪案。

It is not logical to expect a different result if you keep using the same method.

(Chinese) 如果你一直使用同样的方法，却期望得到不同的结果，这不合逻辑。