Which one is grammatical? Or is this a question of style? In a time when someone else is sent to clean up our mess. In a time where someone else is sent to clean up our mess.
What are the rules for the usage of this construct? For example, suppose you've written a StackExchange answer, and later you decided edit it so that your proposed solution handles an additional ...
This is one I struggle with from time to time. Which is better? Methodology X is more suitable in cases where users' needs are well understood up front. Methodology X is more suitable in ...