It is half thought, because at the time of speaking you haven't evaluated yet whether it works or not. It is about being ok with uncertainty when speaking.

It has more to do with whether you think out loud (which I do and have a bit of advantage in such hiring process) and less to do with overall attitude of perfectionism when giving away finished work. I would not hire such person as consultant or support, but I worked with such people on positions that don't require much speaking with customers and they were great to work with.