there are common-sense arguments that suggest Metcalfe's and reed's laws are incorrect.
for example, reed's law says that every new person on a network doubles its value.
adding 10 people, by this reasoning, increases its value a thousandfold.
but that does not even remotely fit our general expectations of network values--a network with 50010 people can't possibly be worth a thousand times as mush as a network with 50000 people.