It doesn’t matter what the question is, who is asking it, how trivial it is or if you have all the facts or not. Just giving a simple answer is important.
Say your client/colleague/spouse/wedding planner asks you whether you should proceed with option A or B. How do you think you sound by saying:
“Well, I am not sure. We could do either really. If we do A blah blah, if we do B blah blah so it depends.” Have you answered the question? No. Do you see eyes rolling yet?
Instead, how do you think you’d sound if you respond with:
“I suggest with go with option B, because it has these merits blah, blah”