Exactly! You are actually considering all the possible ways in which your approach might be wrong and in which the time would be wasted. You are assessing risk before you take action. You are analyzing the subtleties in communication, you determined that the wording relied on a lot of subjective vocabulary and you know that this leads towards misunderstandings. This is, in my humble opinion, the professional way of making decisions as a software engineer.

From reading the other comments, it seems like there are a lot of mind-readers among us. ¯\_(ツ)_/¯