I've been in this field for 30+ years (started in computer operations and worked up from there). Doesn't matter how many questions you ask, at some point you have to make some assumptions based on what you have at the time. Some users don't even know what they want until you give them what they ask for and realize that isn't what they wanted at all.

We never eliminate abiguity, just minimize it. As for the QotD, yes, they are a learning tool, but really will it matter tomorrow if you got the answer today right or wrong? What really matters is that you learned something from the question, and sometimes from the ensuing discussion.

😎