My experience has bit more expansion to this 'mental rule'. I judge something 'proportional to how much I know about it' and in context when it was developed.

My experience has bit more expansion to this 'mental rule'. I judge something 'proportional to how much I know about it' and in context when it was developed. Designers take things outside of the design into consideration. The design may remain alive and in use (but not necessarily the original intended use) way past the original, outside environment.