
It must survive being said down a phone
Every domain that causes trouble causes it in the same moment: somebody says it aloud and the person writing it down gets it wrong. "Bakers-and-co" becomes bakersandco. "Café" becomes cafe. "4U" becomes foryou. A hyphen is invisible in speech and a number has two spellings.
The test costs nothing. Say the domain to somebody who has not seen it written and watch them type it. If they hesitate once, it is the wrong name, and you will hear that hesitation several times a week for as long as the business exists.






