Wiktionary
well-posed
a. (context maths English) Having a unique solution whose value changes only slightly if initial conditions change slightly
Usage examples of "well-posed".
Put less figuratively, well-posed physical questions elicit nonsensical answers from the unhappy amalgam of these two theories.
As was true of any enthusiast trained in the dialectic of Socrates, nothing pleased her more than a well-posed question.
There were those who maintained that cameras weren't really scientific instruments, but rather catch-as-catch-can, razzle-dazzle, pandering to the public, and unable to answer a single straightforward, well-posed scientific question.