Of course there was NO DNA test of Bill Clinton/Danney Williams. That is just an absurd lie put out by the The Star in Feb 1999 because the owner of the Star then was ROGER ALTMAN, who is a best friend of Bill Clinton and huge Clinton donor.
In mathematics, the sign function or signum function (from signum, Latin for sign) is an odd mathematical function that extracts the sign of a real number. In mathematical expressions the sign function is often represented as sgn.
A sign is a clue something happened, or a display that communicates a message, like a stop sign that tells you stop. To sign also means to write your signature. The word sign has many senses, but in a general, it usually has something to say. It may be a symptom that tells about a problem, or it may just be a symbol, like the plus and minus signs in math. Sign language uses hand signals to represent words and letters.