Half as many people will not support half as many enterprises In a given geographical territory, half as many people will not support half as many such enterprises spaced at twice the distance. When distance inconvenience sets in, the small, the various and the personal wither away. Jane Jacobs, The Death and Life of Great American Cities densitydistancegeographybusinesseconomics
The minimum condition When a device is so designed that its component parts are only just strong enough to get the intended result without danger of failure, we may say it is in its minimum condition. I suspect that the functionalists sometimes meant by functional design simply design aimed at the minimum condition for a device. In that case 'form should follow function' would mean that every system should be in its minimum condition, thus having certain limitations imposed on its form. David Pye, The Nature and Aesthetics of Design Form follows function functionconstraintsdesignminimalism