Hacker laws

90–90 Rule: The first 90 percent of the code accounts for the first 90 percent of the development time. The remaining 10 percent of the code accounts for the other 90 percent of the development time. … The Dunning-Kruger Effect: If you’re incompetent, you can’t know you’re incompetent. The skills you need to produce a right answer are exactly the skills you need to recognize what a right answer is. … Hofstadter’s Law: It always takes longer than you expect, even when you take into account Hofstadter’s Law. … Parkinson’s Law: Work expands so as to fill the time available for its completion. … Wheaton’s Law: Don’t be a dick.