"Whenever we capture the complexity of the real world in formal structures, whether language, social structures, or computer systems, we are creating discrete tokens for continuous and fluid phenomena. In so doing, we are bound to have difficulty. However, it is only in doing these things that we can come to understand, to have valid discourse, and to design."

-- Alan Dix, p. 427 in "Upside-down A's and Algorithms - Computational Formalisms and Theory"

"It is pointless – perhaps even damaging – to conduct usability tests merely because testing is fashionable or required by management. ... If designers do not have the time, energy, or authority to make changes, or if they are too deeply attached to their design to be willing to change it, there is no point in asking customers what they want."

-- Laura De Young, in Bringing Design to Software, edited by Terry Winograd, 1996

"No matter how beautiful, no matter how cool your interface, it would be better if there were less of it."

-- Alan Cooper