[robotrout]

    > If you want to be more specific, e.g. include gravity 
    > then you can't say "the rocket equation".

You may not be able to say "the rocket equation" in that context, but NASA does. [1]

[1] https://www.nasa.gov/mission_pages/station/expeditions/exped...

[Maybestring]

Despite Don mentioning gravity along with deltaV he is obviously attempting to describe the classic rocket equation without scaring people away with the math.