I think commanding people instead of asking them is better if you want to achieve something. I think there has been some research on this (source anyone?) and i

I think commanding people instead of asking them is better if you want to achieve something. I think there has been some research on this (source anyone?) and it is particularly well know when talking to children, if you ask it as a question it is ambiguous what the answer might be so you opt in to not "be humble" nor "speak the truth"