Specific, definite, concrete Prefer the specific to the general, the definite to the vague, the concrete to the abstract. William Strunk Jr. & E.B. White, The Elements of Style examples
What makes a good design principle? An Article by Matthew Ström matthewstrom.com Good design principles are memorable. Good design principles help you say no. Good design principles aren't truisms. Good design principles are applicable. uxdesign