The guy who invented food was really smart . <| sep |> Like what ? Besides , rural communities don ' t know what ' s best for them anyway . <| sep |> I believe the comparison between Em drive and solar sails assumes a system that uses an equal amount of solar input ie , the same square meters of reflective foil and solar panel . Wouldn ' t be a very useful comparison otherwise . Reflective foil is certainly easier and lighter than an equivalent area of solar panels , but balancing that is the fact that solar panels are useful for more than just propulsion . You could run some pretty hefty transmitters when the Em drive isn ' t running , for example , which would be nice for most probes and satellites . <| sep |> What did I say that was misinformation or untrue ?