Logical and Safe Design Is Not Always Considered

I want to look at specific part of chapter 5 in The Design of Everyday Things. This chapter focused on human error, how it happens, and how we need to examine it.
There was a paragraph that really stood out in my mind because the logic in it is so basic and the design is somewhat complex but I never noticed it or thought about it.
Cars provide a number of examples of how design relates to error. A variety of fluids re required in the engine compartment of an automobile: engine oil, transmission oil, brake fluid, windshield washer solution, radiator coolant, …read more