How does a mechanic explain to an engineer what "snug" is? I have a clue what torque is, but it's a multi variable problem that is most simply solved by the application of "enough" torque.
I work in a world of measurements, specifications, and numbers. One thing I'm sure of at this point is that the numbers don't matter. I rate the effectiveness of a system based on whether it meets the requirements. If I require a tool not to move on my mill while I work, I'm going to give it enough torque to be "effective". I think this is the answer that has been the lowest common denominator in this thread.