When everything no matter how right or wrong you are in the given situation its easier to say, ERM no. Than give a valid point.
For example a lesson on how to do a spinal operation that consists of a team of fully licences and practiced doctors and they say. "Were making the incision now" and you reply with, "ERM, no"
ERM no;
"I'm sorry to say this but you only have six months to live" - Doctor
"ERM, no"