I think it depends very much on the climate you work in - I worked in a company years ago where NO comments were tolerated and you were on the black list if you dared to question anything. Other companies have been different. I think it is the same with schools - and always has a lot to do with the management you have. Having said that, I am more like Lily. Always opening my trap with relevant questions and wondering at the strange non-answers I get. I really should have learnt by my age that not all people think logically and rationally but prefer to talk in "big ideas" and "visions" and leave the details up to stupid folk like me.