Adage

tip of the iceberg Sturgeon's law On the Internet, nobody knows you're a dog Wirth's law Conway's law There ain't no such thing as a free lunch Rome wasn't built in a day Murphy's law Poles of the worst sort Muphry's law a language is a dialect with an army and navy No good deed goes unpunished Andy and Bill's law Betteridge's law of headlines Parkinson's law Clarke's three laws Hofstadter's law law of holes Poe's law Segal's law Sticks and Stones The pen is mightier than the sword