When printing I accidently hit the cancel-button and was presented with the message:
Are you sure?
This will cancel your print.
Are you sure you want to proceed?
I got 2 buttons, 'NO' and (highlighted) 'YES'
So I pressed YES, because I wanted to continue PRINTING...
'want to proceed'... proceed what? Canceling? Printing?
I would rephrase the question into: Are you sure you want to cancel printing?