I think the realisation comes that a good, experienced programmer doesn't say, when asked to do something, "Yep, it'll be easy!". Instead he demurs and says, "

I think the realisation comes that a good, experienced programmer doesn't say, when asked to do something, "Yep, it'll be easy!". Instead he demurs and says, "That could be a lot of work, it would be irresponsible for me to commit to it."