No it doesn't. A demonstration doesn't require anything in particular. It isn't like you said, science so it doesn't have any rules. The only thing it is requir

No it doesn't. A demonstration doesn't require anything in particular. It isn't like you said, science so it doesn't have any rules. The only thing it is required to do is demonstrate something. This perhaps demonstrates something very specific but what is implied is something more general about Mdonald's stuff, something it didn't really demonstrate in any kind of way. With a control it would have, provided what it demonstrates is real in some way.