There are three primary reasons: ignorance about users, a conflict of interest between serving human needs and construction priorities, and the lack of a process for understanding human needs as an aid to developing appropriate product form and behavior.
Ignorance is one: public ignorance about these disorders, and political ignorance about the many ways they hold back development for countries.
perhaps he could take his time, then feign ignorance about the visa situation when he reached Lisbon airport from where he was planning to fly home.
It is his job to search for the penguin, while his toddler feigns ignorance about its whereabouts.
